Grading and guard catalysts

Grading and guard bed catalysts are used to protect the main bed catalysts from fouling and poisoning. All hydroprocessing units suffer to some degree from fouling of the catalyst bed. In the worst cases, fouling limits the unit’s cycle length rather than main bed catalyst activity, potentially reducing the return on investment in main bed catalyst. A well designed system of grading and guard bed catalysts can prevent problems with pressure drop and fouling, significantly increasing cycle length. Albemarle offers a complete line of catalysts to address all aspects of pressure drop and poison control.