高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (12): 2215.doi: 10.7503/cjcu20160461

• 物理化学 • 上一篇    下一篇

镍硅基催化剂上偏三甲苯的加氢脱烷基反应

夏延洋, 卜天同, 王立成, 朱万春, 杨胥薇, 包强, 郝萌萌, 程东东, 王振旅()   

  1. 吉林大学化学学院, 吉林省表面与界面化学重点实验室, 长春 130021
  • 收稿日期:2016-06-30 出版日期:2016-12-10 发布日期:2016-11-15
  • 作者简介:联系人简介: 王振旅, 男, 博士, 教授, 博士生导师, 主要从事多相催化方面的研究. E-mail:wzl@jlu.edu.cn
  • 基金资助:
    吉林省科技攻关计划重点科技攻关项目(批准号: 20150204020GX)和吉林省科技厅自然科学基金项目(批准号: 20130101015JC)资助

Hydrodealkylation of Trimethylbenzene over Silicon-based Catalyst

XIA Yanyang, BU Tiantong, WANG Licheng, ZHU Wanchun, YANG Xuwei, BAO Qiang, HAO Mengmeng, CHENG Dongdong, WANG Zhenlü*()   

  1. College of Chemistry, Jilin University, Key Laboratory of Surface and Interface Chemistry of Jilin Province, Changchun 130021, China
  • Received:2016-06-30 Online:2016-12-10 Published:2016-11-15
  • Contact: WANG Zhenlü E-mail:wzl@jlu.edu.cn
  • Supported by:
    † Supported by the Jilin Province Science and Technology Research Plan(Key Scientific Research Project), China(No.20150204020GX), and the Natural Science Foundation of Science and Technology Department of Jilin Province, China(No.20130101015JC)

摘要:

分别采用溶胶-凝胶法和浸渍法制备了一系列Ni/SiO2催化剂, 将其用于催化偏三甲苯(1,2,4-TMB)的加氢脱烷基反应. 结果表明, 在制备过程中, 无水柠檬酸(CA)的加入量对催化剂的结构、 表面性质、 粒径及催化性能均有较大影响. 催化剂表面L酸位上1,2,4-TMB几乎不发生歧化和异构化反应. 镍硅体系催化剂上主要副反应为苯环加氢, 通过调整还原镍的粒径可有效控制苯环加氢, 从而提高了二甲苯(BTX)的选择性. 在最佳反应条件下, 10Ni/Si-2.0催化剂上1,2,4-TMB的转化率最高为29.4%, BTX的选择性为99.9%.

关键词: 镍催化剂, 溶胶-凝胶法, 偏三甲苯, 加氢脱烷基

Abstract:

A series of Ni/SiO2 catalysts, prepared via sol-gel and impregnation methods, respectively, was tested in the reaction of hydrodealkylation of 1,2,4-trimethylbenzene(1,2,4-TMB). The results showed that the volume of citric acid anhydrous(CA) have great influence on the structure, surface properties, particle size and catalytic properties. 1,2,4-TMB hardly reacted disproportionation and isomerization reaction on Lewis acid sites. The hydrogenation of benzene ring was main adverse reaction on Ni/SiO2 catalysts. The particle size of Ni on the catalyst could be adjusted in a certain range by changing the amount of CA, and the resultant catalysts exhibited high selectivity for Benzene-Toluene-Xylene(BTX). With the optimum reaction conditions, the highest conversion of 1,2,4-Trimethylbenzene was 29.4% and the selectivity of BTX was 99.9% on the 10Ni/Si-2.0 catalyst.

Key words: Nickel catalyst, Sol-gel method, 1, 2, 4-Ttrimethylbenzene, Hydrodealkylation

中图分类号: 

TrendMD: