太原理工大学学报2017，Vol.48Issue(4)：551-556,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.04.007
孔结构和表面酸性对多种分子筛吸附脱硫性能的影响
Effect of Pore Structure and Surface Acidity on Adsorption Desulfurization Performance of Several Zeolites
摘要
Abstract
Adsorption performances of MCM-41,SBA-15 and NaY zeolites for cyclohexane,benzene,thiophene and tetrahydrothiohene were investigated by static adsorption experiments.The influences of pore structure and surface acid sites on adsorption activity of sorbents were discussed.The results show that,the adsorption capacity of MCM 41 towards these four adsorbates is higher than that by SBA-15 zeolite because of the larger surface area and pore volume of MCM-41 zeolite.NaY zeolite has both Lewis and Br(o)nsted acid sites on its surface,and its pore size is close to the dynamic diameter of cyclohexane,benzene,thiophene,and tetrahydrothiophene molecules,which results in the significantly larger adsorption capacity of NaY than that of MCM-41 and SBA-15.Moreover,the interaction between conjugated π bond and Lewis acid sites contributes a lot to the adsorption performance of NaY zeolite,and the adsorption capacity follows the descending order of thiophene,tetrahydrothiophene,benzene,and cyclohexane.Whereas,the interaction between the lone pair electrons of S atom and Bronsted acid sites contributes more to the adsorption performance of MCM-41 and SBA-15 zeolites,and the desscending adsorption capacity order is tetrahydrothiophene,thiophene,benzene,and cyclohexane.关键词
分子筛/表面酸性/吸附脱硫Key words
zeolites/surface acidity/adsorptive desulfurization分类
化学化工引用本文复制引用
薛鸿霏,廖俊杰,刘洋,常丽萍,鲍卫仁..孔结构和表面酸性对多种分子筛吸附脱硫性能的影响[J].太原理工大学学报,2017,48(4):551-556,6.基金项目
国家自然科学基金资助项目:吸附剂表面修饰和结构调变对焦化苯中噻吩深度脱除的影响及其再利用研究(51372161) （51372161）
国家自然科学基金资助项目:吸附剂的表面化学特性对深度脱除汽油中噻吩类含硫化合物的影响及吸附机理研究(21406151) （21406151）
