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AM-01-59 THE EFFECTS OF FE POISONING ON FCC CATALYSTS

George Yaluris, Davison Catalysts

Format:
Electronic (digital download/no shipping)

Associate Member, International Member, Petrochemical Member, Refining Member - $0.00
Government, NonMember - $25.00

Description:

Contamination of FCC catalyst with metals, like Ni, Na, V and Fe, coming from feed or other sources has always been a major issue in most FCC units. However, for Ni, V and Na, catalytic and other solutions have been developed over time that have allowed the FCCU to operate at high levels of contamination. Fe has also been known to adversely affect the performance of FCC catalysts, but until recently Fe related problems in FCC units were largely unreported, and unlike Ni, V and Na, little work has been done to understand the effects of Fe on FCC catalysts. Today because of increased processing of high Fe feeds, and the need by many units to process heavy local feeds, the effects of Fe on the unit operation cannot be ignored. Increasing Fe on the equilibrium catalyst (ECAT) can have serious adverse effects, including loss of activity and bottoms cracking, as well as increased SOx emissions and CRC (in partial burn units). ECAT ABD has also been reported to decrease. Despite these dramatic effects, until now, little has been published about how Fe impairs catalyst performance. Thus, Davison Catalysts has undertaken an extensive research program to understand the mechanism by which Fe deactivates FCC catalysts, and to develop practical solutions to address the problem. It appears that there are two types of Fe. One type consists primarily of particles of inorganic Fe from pipes, storage tanks and other hardware. This type is usually called “tramp” Fe and is generally benign in FCCU operation. The other type is primarily organic Fe coming from feed and/or from hardware corrosion by naphthenic acids and other corrosive feed components. Because of the deleterious effects on unit performance, we have focused our work on the latter type of Fe and investigated the mechanism for Fe-induced catalyst deactivation. In this paper we present the results of our work and we recommend a strategy to deal with FCC catalyst poisoning caused by Fe.

Product Details:

Product ID: AM-01-59
Publication Year: 2001