摘要
采用浸渍法制备Co-Mo-Ni-W/γ-Al2O3柴油加氢精制催化剂,考察了扩孔剂及焙烧温度对载体物化性能的影响和浸渍液的配制方法对其稳定性的影响。并考察了催化剂第1次浸渍后的焙烧温度以及3种催化剂的加氢精制活性。实验结果表明,在载体制备过程中适量加入扩孔剂,可得到孔分布集中、比表面积和孔容适中的载体;载体于550℃焙烧时,可制备出具有良好的孔分布和较高机械强度及较大的比表面积的催化剂;在低温条件下配制的浸渍液具有良好的稳定性和可溶性;催化剂第1次浸渍后于450℃条件下焙烧,可使催化剂中的各活性组分均匀分布于载体上;通过催化剂的加氢活性评价,3种催化剂均具有良好的柴油加氢精制活性和工业应用前景。
A Co-Mo-Ni-W/γ-Al2O3 hydrofining catalyst for poor-quality diesel was prepared using impregnation method. The effects of pore enlargement agent and calcination temperature on the physicochemical properties of supports and the impregnation solution preparation condition on it＇s stability were examined. The effects of calcination temperature of catalyst after the first impregnation on the hydrofining activity of the three different catalysts were investigated. The results showed that the support prepared by adding pore enlargement agent had appropriate pore size distribution, specific surface area, and pore volume. When the calcination temperature of support was 550 ℃, the catalyst had better pore size distribution, higher mechanical strength and larger specific surface area. The impregnation solution prepared in low temperature had better stability and solubility. Active components in catalyst calcined in 450 ℃ after the first impregnation were dispersed uniformly on the support. The catalytic performance evaluation results showed that three catalysts exhibited high diesel hydrofining activity.
出处
《工业催化》
CAS
2008年第2期18-22,共5页
Industrial Catalysis
关键词
催化剂工程
柴油
加氢精制催化剂
浸渍
catalyst engineering
diesel
hydrofining catalyst
impregnation
