Deactivation of hydrotreating catalysts (A review)

The results of studies on deactivation of hydrotreating catalysts reported in scientific and technical literature are considered and systematized in the review. The effect exerted by the feedstock composition and hydrotreatment conditions on the catalyst coking is revealed. The factorsleading to changes in the morphology of active component and the possibilities to weaken this type of catalyst deactivation during commercial operation are considered. The effect of a pressure drop over the catalyst bed on the run time as well as the action of catalytic poisons and the ways of their penetration into hydrotreatment distillates are shown. This review can be interesting and useful to chemical engineers involved in the study of catalytic systems and to oil industry specialists.