PREPARATION AND EVALUATION OF NON-CALCINATION CATALYSTS FOR FCC GASOLINE SELECTIVE HYDRODESULFURIZATION

Non-calcination catalysts are prepared by the incipient co-impregnation method,and the influences of active constituent loadings,promoter P and chelating agents on catalytic performance of the catalysts are studied.The results show that the catalyst with 3% CoO and 12% MoO3 load exhibites the highest HDS activity,and the addition of promoter phosphorus could significantly increase HDS selectivity of the catalyst,but has little effect on the HDS activity,and the chelating agent citric acid(CA) has important influence on the catalytic performance of the catalyst.The catalyst with 0.75 mol CA/mol(Co + Mo) showes the best HDS activity.