粘结组分对脱硫剂脱硫性能及机械强度的影响

Effects of Binder Component to Adsorptive Desulfurization Catalyst for FCC Gasoline on Desulfurization Performance and Mechanical Strength

以Al_2O_3、HNO_3等为粘结组分,ZnO为储硫物质,Ni为活性成分,采用等体积浸渍法制备了Ni/ZnO吸附脱硫剂。通过改变制备时粘结组分中的拟薄水铝石和硅藻土的质量比、硝酸用量、拟薄水铝石与硅藻土的总加入量和载体混捏时间,考察了粘结组分对吸附脱硫剂活性及机械强度的影响。结果表明,随胶溶剂硝酸、拟薄水铝石和硅藻土的总加入量增多,吸附脱硫剂脱硫性能提高,随载体中拟薄水铝石与硅藻土加入质量之比增大,吸附脱硫剂脱硫性能先提高后降低存在最优值,随载体混捏时间增长吸附脱硫剂脱硫性能先提高后趋于稳定;随载体中拟薄水铝石与硅藻土加入质量之比提高,加入胶溶剂硝酸减少,拟薄水铝石与硅藻土的总加入量增大,吸附脱硫剂机械强度提高。

Using Al_2O_3,HNO_3 and other components as binder component,Ni as active component,ZnO as sulfur storage material,the adsorptive desulfurization catalyst was prepared by equal volume impregnation method.The effects of the Al/Si mass ratio,kneading time of the supporter,adding quality percentage of nitric acid and binder component on catalyst＇s desulfurization performance and mechanical strength were investigated.The results showed that the catalyst＇s desulfurization performancewas improved when the adding quality of nitric acid,pseudo-boehmite and kieselguhr was increased.The desulfurization performance was increased and then decreased with increasing of Al/Si mass ratio,increased and then kept stable with increasing of kneading time.The catalyst＇s mechanical strength was improved when the Al/Si mass ratio increased,the adding quantity of nitric acid decreased,pseudo-boehmite and kieselguhr increased and the kneading time increased.