分子筛-氧化铝基FCC汽油异构/加氢脱硫催化剂研究  

Study on the Catalysts Supported on Molecular Sieve-Alumina Composite for FCC Gasoline Isomerization/Hydrodesulfurization

作　　者：梁乃森[1] 许楠[1] 张舜光[1] 段艳[1] 王佳敏[1] 侯凯湖[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《高校化学工程学报》2012年第5期883-888,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：河北省自然科学基金(B2010000036)

摘　　要：采用等体积浸渍法分别制备了以SAPO-11/γ-Al2O3,Hβ/γ-Al2O3,HY/γ-Al2O3,MCM-41/γ-Al2O3复合物为载体的负载型Co-Mo催化剂,采用BET、NH3-TPD、FT-IR等技术表征了催化剂载体。在固定床反应装置上,以噻吩和1-己烯分别作为加氢脱硫和烯烃异构反应的探针分子,考察了催化剂的异构化性能和加氢脱硫性能,研究了复合载体MCM-41/γ-Al2O3配比及其磷酸(P)和柠檬酸(CA)改性对催化剂催化性能的影响。结果表明,MCM-41:γ-Al2O3质量比为7:3的复合物是适宜的催化剂载体;P或CA改性增加了载体的B酸中心和L酸中心以及AB/AL比值;载体P或CA改性皆对催化剂的加氢脱硫性能有明显的促进作用,而未能明显改善催化剂的异构性能。The Co-Mo catalysts respectively supported on the composite supports of SAPO-11/γ-Al2O3 and Hβ/γ-Al2O3 HY/γ-Al2O3,MCM-41/γ-Al2O3 were prepared by the incipient wetness impregnation method,and the used composite supports were characterized by BET,NH3-TPD and FT-IR techniques.The isomerization activity and the desulfurization activity of the catalysts were examined in a fixed-bed reactor,using 1-hexene and thiophene as probe molecules,the effects of the composition and modification with citric acid（CA） and phosphorus（P） of the selected MCM-41/γ-Al2O3 support on the performance of the catalysts were examined.The results indicate that the composite of MCM-41/γ-Al2O3 with mass ratio 7：3 is the suitable support,and the support modification with P or CA can significantly enhance the desulfurization activity of the catalysts,but at the some time the isomerization activity of the catalysts has no evident improvement.

关 键 词：异构 加氢脱硫 复合载体 催化剂 

分 类 号：TQ426.95[化学工程] TE674.431[石油与天然气工程—油气加工工程]