高等学校化学学报2011，Vol.32Issue(3)：787-792,6.
NiY分子筛选择性吸附脱硫性能及作用机理
Selective Adsorption Desulfurization Performance and Adsorptive Mechanisms of NiY Zeolites
摘要
Abstract
NiY zeolites were prepared by liquid phase ion exchange method and the adsorbents were characterized by XRD, TEM, ICP, nitrogen adsorption and Py-IR. The adsorptive behavior of thiophene (T),2-methylthiophene ( 2-MT), 3-methylthiophene ( 3-MT ), tetrahydrothiophene ( THT ), benzothiophene ( BT ),dibenzothiophene( DBT), 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldiben-zothiophene (4,6-DMDBT) on NiY zeolites were investigated by a fixed bed, gas chromatography-suffur chemiluminescence detector(GC-SCD) and Fourier transform infrared(FTIR). The results show that the breakthrough adsorption capacities of different suffur compounds are in the order of THT ＞ BT ≈ DBT ≈ 4,6-DMDBT ＞ 4-MDBT ＞3-MT≈2-MT ＞ T, indicating that the steric hindrance of sulfur compounds is not the crucial factor for their adsorptive properties on NiY zeolites. The mechanisms of thiophene and thiophene derivatives interacting with NiY zeolites are different, but the direct S-M interaction is the domain process. Thiophene and thiophene alkyl complex adsorbed on the surface acidic sites of the sorbents can subsequently undergo the opening of the heterocyclic rings and then to form some larger suffur compounds. These polymer molecules will plug the pore of zeolite, resulting in the decreasing of the desulfurization capacity of the NiY. Adsorption mechanisms and surface acidity of NiY zeolites are the key factors for the selective adsorption desuffurization.关键词
液相离子交换/NiY分子筛/吸附脱硫/表面酸性Key words
Liquid phase ion exchanging/ NiY zeolite/ Adsorptive desulfurization/ Surface acidity分类
化学化工引用本文复制引用
宋丽娟,潘明雪,秦玉才,鞠秀芳,段林海,陈晓陆..NiY分子筛选择性吸附脱硫性能及作用机理[J].高等学校化学学报,2011,32(3):787-792,6.基金项目
国家"九七三"计划项目(批准号:2007CB216403)和国家自然科学基金(批准号:20976077,21076100)资助. （批准号:2007CB216403）
