【作者】 徐克琪； 陈胜利； 董鹏； 袁桂梅； 祁彦平；

【Author】 XU Ke-qi, CHEN Sheng-li, DONG Peng, YUAN Gui-mei, QIYan-ping (China University of Petroleum, Beijing 102249, China)

【机构】 中国石油大学重质油国家重点实验室；

【摘要】 本实验制备以聚苯乙烯(PS)颗粒和聚苯乙烯-聚甲基丙烯酸甲酯(PS-PMMA)颗粒为模板的大孔 ReUSY／SiO2-Al2O3的FCC催化剂,其中催化剂的组成为15%的ReUSY 85％的SiO2-Al2O3,模板和催化剂的质量比为1:4,模板颗粒的粒径范围是20-150 nm．新型孔结构催化剂比没加模板的催化剂具有更大的比表面,更大的孔径分布和更多的孔体积,BET比表面分别增加了68．7和52．2 m2／g,压汞法测得孔体积分别增加了0．180和0．154 cm3／g．与没加模板剂的催化相比,这种新型孔结构催化剂具有很高的重油裂解能力．更多还原

【Abstract】 For heavy oil cracking, the pore structure of catalyst should be accessible for primary crackling of the large hydrocarbon molecules so that the forming smaller molecules can transfer into zeolite channels and further cracked into the gasoline on zeolite activity site. However, the pore size of current FCC catalyst is not large enough for heavy oil cracking. A large pore size REUSY/SiO2-Al2O3 FCC catalyst was prepared using polystyrene (PS) and polystyrene-poly(methylmethacrylate) particles as template. The RFCC catalyst contains 15% REUSY and 85% SiO2-Al2O3. The mass ratio of the PS template to the catalyst is 1:4 and the PS particles template has the diameter in the range of 20~150 nm. BET method, mercury intrusion method and scanning electron microscope (SEM) were used to characterize the novel pore structure catalysts. It is found that the novel pore structure catalysts have higher surface areas, larger pore size and more pore voids than those of the catalyst prepared without PS template. The BET specific surface areas are increased by 68.7 and 52.2 m2/g separately, mercury intrusion pore volumes increased by 0.180 and 0.154 cm3/g. The novel pore structure catalyst showed higher heavy oil cracking ability. The conversion of a heavy oil on the novel pore structure FCC catalyst was higher than 93.3%, while the conversion rate was only 66.5% using the catalyst prepared without PS template under the same reaction conditions.更多还原