燃料化学学报2018，Vol.46Issue(3)：355-364,10.
改性HZSM-5分子筛上噻吩烷基化反应和失活再生性能的研究
Study on the alkylation of thiophene and catalyst deactivation and regeneration with modified HZSM-5 zeolite
摘要
Abstract
HZSM-5 zeolites were treated by different alkalis alone or different combining ways with two kind of alkalis to prepare micro-meso hierarchical pore HZSM-5 catalysts for thiophene alkylation reaction. The result show that mesopores are created in molecular sieves and the acidity of catalysts after treated is modulated by single alkali or different combining methods of double alkalis. Simultaneously,the structure of catalyst obtained by the separate treatment of Na2CO3 solution and TPAOH solution is most suitable for the thiophene alkylation reaction. Furthermore, the stability of the thiophene alkylation reaction over the catalyst with the best microstructure was investigated, and the reason of catalyst deactivation and the regeneration conditions were determined. The results show that the catalysts are basically inactivated after thiophene alkylation reaction for 1050 h. During the reaction, the macromolecular compounds such as olefin oligomerization formed by the cyclization, dehydrogenation and aromatics alkylation are deposited on the catalyst, blocking the pore and then covering the active site of the catalyst. From the viewpoint of the high energy consumption in regeneration at high temperature and the adverse effect of repeated high temperature regeneration on the acidity and skeleton structure of the catalyst,the catalyst should be regenerated at the temperature of 550℃.关键词
碱改性/噻吩烷基化/HZSM-5/失活与再生Key words
alkali modified/thiophene alkylation/HZSM-5/inactivation and regeneration分类
石油、天然气工程引用本文复制引用
刘冬梅,蒋涵博,曲圣涛,王海彦,杨占旭,张玉嵩..改性HZSM-5分子筛上噻吩烷基化反应和失活再生性能的研究[J].燃料化学学报,2018,46(3):355-364,10.基金项目
The project was supported by the Liaoning Education Department of Basic Research Program of China(L2017LQN012)and Ph.D.Start-up Funding(1100130210)and Liaoning Province Large-Seale Instrument Equipment Sharing Service Platform Capacity-Building Research Fund Project of China(2016LD0106).辽宁省教育厅基本科研项目(L2017LQN012),博士启动项目(1100130210)和辽宁省大型仪器设备共享服务平台能力建设研究基金(2016LD0106)资助 （L2017LQN012）
