FeZSM-5分子筛中平衡阳离子与乙苯脱氢活性的关系研究(Ⅱ)  

The Study on the Relation Between the Cations of FeZSM-5 Molecular Sieves and Dehydrogenation Activity of Ethylenebenzene(II)

作　　者：于龙[1] 刘祁涛[1] 姜卉[1] 赵迪[2] 

机构地区：[1]辽宁大学化学系 [2]辽宁大学分析测试中心

出　　处：《辽宁大学学报（自然科学版）》1993年第4期43-46,共4页Journal of Liaoning University：Natural Sciences Edition

基　　金：国家自然科学基金

摘　　要：本文采用阳离子交换法对FeZSM-5分子筛进行改性,利用乙苯的吸附扩散性能评价阳离子对分子筛孔道的修饰作用,证明骨架铁是催化乙苯脱氢反应的活性中心,金属阳离子对分子筛结构的修饰对乙苯脱氢影响不起主要作用,而对骨架铁的极化作用才是乙苯脱氢活性改变的真正原因。Here we report that the properties of FeZSM-5 molecalar sieyes were changed by ion—exchange method, and the modification of catioil acted to the channel of molecular sieves were appraised by using the adsorption and diffusion of ethylenebenzene. It was established that Fe atoms located in the framework are the active centers for dehydrogenation of ethylenebenzene. We found that in dehydrogenation, the true reason for activity change of FeZSM-5 molecular sieves is the polarization of Fe atoms in framework, not the modification of cations acted upon the channel of molecular sieves.

关 键 词：ZSM-5分子筛 阳离子 催化脱氢 

分 类 号：O658.62[理学—分析化学]