汽油在钾修饰MCM-22分子筛上的烷基化脱硫  

Alkylation desulfurization of thiophene in gasoline over potassium modified MCM-22 zeolites

作　　者：郭晓野[1] 张泽凯[2] 刘盛林[2] 李玉宁[2] 戴洪义[1] 徐龙伢[2] 

机构地区：[1]大连工业大学,辽宁大连116100 [2]中科院大连化学物理研究所,辽宁大连116023

出　　处：《工业催化》2008年第6期31-34,共4页Industrial Catalysis

基　　金：国家重点基础研究发展计划项目[国家973项目(2005CB221403)];中国科学院知识创新工程领域前沿项目(DICPK2007D3)

摘　　要：在固定床上考察了钾修饰的MCM-22分子筛上模拟催化裂化汽油中的噻吩烷基化脱硫。结果表明,催化剂的强酸有利于噻吩烷基化脱硫反应活性。钾处理显著降低了MCM-22分子筛的强酸数量,对弱酸的影响则相对较小。随着负载钾质量分数的增加,催化剂反应活性显著降低,而噻吩烷基化反应选择性却存在一最佳值,另外,催化剂的稳定性可以得到一定程度改善。Olefin alkylation of thiophenic sulfur （OATS） in FCC gasoline over potassium modified MCM-22zeolite was investigated in a fixed-bed flow reactor. The results indicated that strong acid sites of the MCM-22 zeolite favored its OATS activity. Potassium modification notably decreased strong acid sites of the HMCM-22, with less influence on its weak acid sites. OATS catalytic activity of the K/HMCM-22 zeolite declined remarkably with K loadings. MCM-22 zeolite modified by proper amount of potassium exhibited maximum OATS selectivity. Activity stability of the zeolite was improved by potassium modification as well.

关 键 词：催化化学 噻吩硫 汽油脱硫 MCM-22分子筛催化剂 烷基化 钾修饰 

分 类 号：TE624.48[石油与天然气工程—油气加工工程] TQ426.95[化学工程]