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Silica Management

Silicon is a well-known widespread poison for hydroprocessing catalysts.

Silicon builds-up on the catalyst leads to decrease of access to the active sites and by extent to a cycle reduction. Silicon poisoning is not only an issue for hydrotreating catalysts: contamination of reforming catalysts may also occur as silicon breakthrough from naphtha hydrotreaters. Axens can propose specific strategies and a portfolio of silica traps to control this contamination.

SiTrap® ACT 921

ACT 921 exhibits the highest Silicon retention coupled with medium hydrotreating activity and is mostly suited for Naphtha and Distillates services.

Characteristics NiMo, Al₂O₃
Shape Multilobe Extrudate
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Technical Data Sheet Safety Data Sheet

SiTrap® ACT 971

Application on Naphtha & Diesel. ACT 971 exhibits a very high Silicon retention, without compromising the catalyst medium Hydrotreating activity.

Characteristics NiMo, Al₂O₃
Shape Multilobe Extrudate
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Technical Data Sheet Safety Data Sheet

SiTrap® ACT 991

Application on VGO & DAO. ACT 991 pore structure has been especially optimized for heavy feeds, and allows the maximization of the diffusion of the Si-molecules through the catalyst grain and minimize the pore-mouth plugging.

Characteristics CoMoNi, Al₂O₃
Shape Multilobe Extrudate
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Technical Data Sheet Safety Data Sheet
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