厦门大学学报（自然科学版）2012，Vol.51Issue(5)：882-887,6.
碱处理法改性ZSM-5分子筛催化苯与乙醇烷基化制乙苯
Study on Surface Acidity and Morphology of Alkaline-treated ZSM-5 Zeolite for Alkylation of Benzene with Ethanol to Ethylbenzene
李建军 1甘玉花 1王伟明 1方维平 1杨意泉2
作者信息
- 1. 厦门大学化学化工学院,福建厦门361005
- 2. 厦门大学醇醚酯清洁生产国家工程实验室,福建厦门361005
- 折叠
摘要
Abstract
The alkylation of benzene with ethanol to produce ethylbenzene over ZSM-5 catalyst has been widely investigated. In order to improve the ZSM-5 catalyst performance,the ZSM-5 zeolite catalysts were modified by desilication treatment in alkaline solution with different concentrations for the alkylation of benzene with ethanol to ethylbenzene, and characterized by X-ray diffraction (XRD) .scanning electron microscope(SEM) ,NH3-TPD,and BET techniques. The characterization results show that mesopore size distribution of the catalysts can be controlled by changing NaOH solution concentration without destroying framework of ZSM-5 zeolite. With the increase concentration of NaOH solution, the amount of acid sites,mesopore volume,and specific surface area increased, the pore size distribution became broader. Therefore,the catalytic performance for the reaction was effectively improved. It was found that the optimal concentration of NaOH solution used to treat the ZSM-5 zeolite was 0. 2 mol/L. When the NaOH concentration was over 0. 5 mol/L the framework of ZSM-5 zeolite was found to be severely destroyed.关键词
ZSM-5分子筛/碱处理/烷基化/苯Key words
ZSM-5 zeolite/alkali-treatment/alkylation/benzene分类
化学化工引用本文复制引用
李建军,甘玉花,王伟明,方维平,杨意泉..碱处理法改性ZSM-5分子筛催化苯与乙醇烷基化制乙苯[J].厦门大学学报（自然科学版）,2012,51(5):882-887,6.
