Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).

Hydrotreating Catalysts and Guards Bed

In the refining industry, the hydrotreating process is recognized as a critical step for removing impurities such as sulfur, nitrogen, and heavy metals from petroleum fractions. The success of this process depends not only on the main catalyst but also on an intelligent protection system at the reactor inlet to safeguard the primary investment—the catalyst.

1. Guards Bed

Guards Bed materials are layers of uniquely structured materials placed at the top of the main catalyst bed. Their primary function is to trap contaminants before they reach the expensive main catalysts.

Why is a Guards Bed Essential?

The feed entering hydrotreating reactors typically contains harmful impurities that can rapidly degrade the main catalyst’s performance. Iron present in the feed easily converts to iron sulfide, a compound that causes coke formation on the catalyst’s external surface. This process not only plugs the catalyst pores and destroys its activity but also increases pressure drop (ΔP) by filling the void space between catalyst particles, leading to unscheduled unit shutdowns.

Mechanism of Action:

Physical Trapping: Inert guard materials (such as the SGC0 Series) are designed with appropriate void space and specific geometry to trap solid particles and debris.

Active Chemical Adsorption: Active guard materials (such as the SHT13 Series) possess high hydrodemetallization (HDM) activity and deposit metals like iron, arsenic, nickel, and vanadium within their porous structure. These catalysts have a significantly higher metal holding capacity compared to conventional catalysts.

Key Benefits of the Guards Bed System:

Significantly extends the service life of the main catalyst
Reduces catalyst replacement costs (as only the guard bed is replaced)
Minimizes unit shutdown frequency and increases operational cycle length

2. Hydrotreating Catalysts

After the feed passes through the guard bed and primary contaminants are removed, it reaches the main hydrotreating catalysts. These catalysts are responsible for removing molecular impurities such as sulfur and nitrogen to produce high-quality end products that meet environmental standards.

Composition and Performance:

Hydrotreating catalysts typically utilize active metals such as Cobalt-Molybdenum (CoMo) for sulfur removal (HDS) and Nickel-Molybdenum (NiMo) for nitrogen removal (HDN) and aromatic hydrogenation. These metals are supported on an alumina (Al₂O₃) base.

Key Differences in Catalyst Selection:

CoMo: Better suited for conditions requiring high sulfur removal (HDS) but with low nitrogen content. This catalyst has a higher tendency to break carbon-sulfur bonds.

NiMo: Better suited for feeds with high nitrogen content or requiring aromatic hydrogenation (saturation of benzene rings). This catalyst has higher hydrogenation power and is essential for achieving ultra-low sulfur levels.

Specialized Applications Based on Petroleum Fractions:

Naphtha Processes:

LNHT, HNHT, FRNHT: Light, Heavy, and Full Range Naphtha Hydrotreating. The primary goal of these catalysts is nitrogen removal to prevent poisoning of platinum catalysts in downstream units (such as reforming).

Middle Distillates:

KHT, GHT: Kerosene and Gasoline Hydrotreating.

HDS, GKHDS: Deep Hydrodesulfurization of diesel and kerosene to produce clean fuels (e.g., Euro V standards).

Catalyst Grades:

The list of available grades (such as SHT12-11, SHT13-22, SGH34-1, etc.) represents different generations of catalysts with optimized formulations. Each code signifies a specific balance between activity, stability, and resistance to poisoning, engineered for specific operating conditions (temperature, pressure, feed type).