含碱土金属分子筛对FCC催化剂催化性能的影响  

INFLUENCE OF ZEOLITES CONTAINING ALKALINE EARTH METAL ON PERFORMANCE OF FCC CATALYSTS

作　　者：朱华元[1,2] 何鸣元[1] 宋家庆[1] 张信[3] 罗一斌[1] 

机构地区：[1]中国石化石油化工科学研究院 [2]中国石化股份公司长岭分公司研究院,湖南岳阳414012 [3]中国石化股份公司长岭分公司研究院

出　　处：《石油学报（石油加工）》2001年第6期6-10,共5页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：通过在FCC催化剂中引入含碱土金属的分子筛 ,提高了FCC催化剂的重油转化能力和氢转移反应活性 ,同时催化剂还保持良好的焦炭选择性 ;着重考察了含碱土金属分子筛中不同碱土金属离子和分子筛类型对FCC催化剂性能的影响 ;从催化剂酸性质的变化对含碱土金属分子筛的作用原因进行了初步的探讨。结果表明 ,含Mg、Ca分子筛的FCC催化剂具有重油转化能力强、氢转移反应活性高及焦炭选择性好等特点。含Mg、Ca分子筛的引入 ,改进了FCC催化剂的性能 ,这与催化剂酸性发生变化 ,即总酸量以及B酸对L酸的比例增加 ,特别是强酸量减少、中强酸比例提高有关。Heavy oil crackability and hydrogen transfer reaction activity of FCC catalysts have been improved at same time while maintaining the coke selectivity by incorporation of zeolites containing alkaline earth cations Work was emphasized on the effects of different alkaline earth cations and different types of zeolites with respect to the acidity of catalysts Catalysts containing Mg or Ca zeolites show stronger heavy oil crack ability and higher hydrogen transfer reaction activity at the same coke selectivity than those not containing Mg or Ca zeolites, which can be related to the increase of total amount of acid sites and the ratio of Bronsted acid to Lewis acid,especially the decrease of strong acid sites and the increase of medium acid sites

关 键 词：碱土金属 分子筛 催化裂化催化剂 酸性 性能 

分 类 号：TE624.91[石油与天然气工程—油气加工工程]