COMMERCIALLY PROVEN RESID FCC CATALYST TECHNOLOGY FOR MORE PROPYLENE PROCESSING FEEDSTOCK WITH ULTRAHIGH CONTAMINANT METALS

摘要

Metal contamination in FCC feedstock becoming gradually grave. Heavy metals, such as vanadium and nickel existing in petroleum feedstock have the most significant impact on fluid catalytic cracking (FCC) catalyst's performancef. During cracking process these metals are deposited on the catalyst and affect both catalytic activity and selectivity. The major effect of vanadium is to produce additional gas and coke make, causes partial destruction of the zeolite under steam. In the case of vanadium, the loss in activity is due primarily to zeolite destruction and is irreversible. Therefore, the study of the interactions between the metal and the components of FCC catalysts has remained to be an important research topic to refiners and catalysts manufacture.