燃料化学学报2016，Vol.44Issue(9)：1082-1088,7.
NiY分子筛表面酸性影响其选择性吸附脱硫性能的机理研究
Mechanism of effects of surface acidity on performance of adsorption desulfurization of NiY zeolites
摘要
Abstract
The adsorption behaviors of thiophene, cyclohexene and benzene, and competitive adsorption of thiophene & cyclohexene, and thiophene & benzene over NiY zeolites were studied by in situ Py-FTIR spectroscopy method. The results of single probe molecular adsorption indicate that the Lewis ( L ) acid sites according to Ni species are the major active centers for the thiophene adsorption, more over the Brönsted ( B) acid sites of the NiY and HY are the catalytic active centers of the protonation and oligomerization of thiophene and cyclohexene, while the reaction intensity on NiY is significantly weaker than that on HY zeolite. The competitive adsorption results show that the strongly adsorbed dimeric cyclohexene on B acidic sites in NiY zeolite plays a significant competitive adsorption to thiophene adsorption behavior. The effective solutions to solve the competitive adsorption from olefins and aromatics to thiophene are to reduce the surface B acid centers of the adsorbent and to increase temperature of adsorption system.关键词
原位红外光谱/NiY分子筛/表面酸性/吸附脱硫/竞争吸附Key words
in situ Py-FTIR/NiY zeolite/surface acidity/adsorption desulfurization/competitive adsorption分类
化学化工引用本文复制引用
宋丽娟,胡月婷,秦玉才,于文广,张晓彤..NiY分子筛表面酸性影响其选择性吸附脱硫性能的机理研究[J].燃料化学学报,2016,44(9):1082-1088,7.基金项目
The project was supported by the National Natural Science Foundation of China (21076100,21376114) and China National Petroleum Corporation Refinery Catalyst Major Projects(10-01A-01-01-01).国家自然科学基金(21076100,21376114)和中国石油天然气股份有限公司炼油催化剂重大专项(10-01A-01-01-01)资助 （21076100,21376114）
