免焙烧FCC汽油加氢脱硫催化剂的制备与评价

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

采用等体积共浸渍法制备了免焙烧Co-Mo加氢脱硫催化剂,以FCC汽油重馏分为原料,考察了活性组分负载量、助剂P和螯合剂对催化剂加氢脱硫性能的影响。结果表明,CoO、MoO3负载量分别为3%和12%的催化剂具有最优的加氢脱硫活性和选择性;助剂P可提高催化剂的加氢脱硫选择性,但对活性影响较小;螯合剂柠檬酸(CA)对催化剂的催化性能影响较显著,当每摩尔(Co+Mo)中添加0.75mol的CA时,催化剂的催化活性最高。

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.