Influence of process conditions and catalyst properties on catalyst deactivation during hydroprocessing of Kuwait vacuum residue

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:215057

Absi-Halabi, M; Stanislaus, A ^[1]

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1. Kuwait Institute for Scientific Research, Safat (Kuwait)

A comprehensive study of catalyst deactivation during hydroprocessing of Kuwait vacuum residue in trickle-bed reactors was carried out. The influence of selected process and catalyst parameters including temperature, hydrogen pressure, liquid hourly space velocity, presulfiding and catalyst pore size on coke and metals deposition was investigated. Increasing reactor temperature increased both coke and metal deposition on the catalyst, while increasing pressure decreased coke deposition. Vanadium deposition on the other hand increased with increasing pressure. Increasing feed flow rates increased the rate of deactivation by metals, but decreased coke deposition. Catalyst pore size distribution had a significant effect on catalyst deactivation. The rate of deactivation by both coke and metals deposition was found to be higher for catalysts having predominantly narrow pores. Presulfiding of the catalyst reduced coking and led to better distribution of foulant metals within the catalyst pellet. The effect of the studied parameters on surface area and pore volume of the catalyst was determined. Mechanistic arguments will be presented to explain the results.

• OSTI ID: 215057
• Report Number(s): CONF-950801--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
COKE
DEACTIVATION
PETROLEUM RESIDUES
POROSITY
PROCESSING
SURFACE AREA
TEMPERATURE DEPENDENCE