石油化工2025，Vol.54Issue(9)：1235-1241,7.DOI:10.3969/j.issn.1000-8144.2025.09.002
ZSM-5分子筛性质对甲苯歧化反应性能的影响
Effect of ZSM-5 molecular sieve properties on the performance of toluene disproportionation reaction
王宗霜 1石张平 1李经球1
作者信息
- 1. 中石化(上海)石油化工研究院有限公司 绿色化工与工业催化全国重点实验室,上海 201208
- 折叠
摘要
Abstract
Three types of ZSM-5 molecular sieves were synthesized by the hydrothermal crystallization method.These molecular sieves were characterized for their morphology,structure,and acidic properties by use of techniques such as XRD,SEM,N2 adsorption-desorption,NH3-TPD,and liquid amine titration.The effect of molecular sieve properties on the performance of the toluene disproportionation reaction was investigated.Experimental results indicates that the toluene disproportionation reaction on ZSM-5 molecular sieves is sensitive to both acidic properties and crystallinity.The amount of acid and the crystallinity of the molecular sieve directly affect the reaction conversion rate.The distribution of reaction products is related to the morphology of the molecular sieve.ZSM-5 molecular sieves with larger crystal sizes have a lower amount of acid on the external surface and a lower selectivity for C9+aromatic by-products.However,the longer channels can hinder the diffusion of product molecules,intensify the dealkylation side reactions,and result in a relatively higher selectivity of benzene.关键词
甲苯歧化/ZSM-5分子筛/酸催化Key words
toluene disproportionation/ZSM-5 molecular sieve/acid catalysis分类
化学化工引用本文复制引用
王宗霜,石张平,李经球..ZSM-5分子筛性质对甲苯歧化反应性能的影响[J].石油化工,2025,54(9):1235-1241,7.
