化工进展2011，Vol.30Issue(12)：2637-2641,5.
Ga改性的HZSM-5分子筛甲醇芳构化催化反应性能
Property of HZSM-5 catalysts promoted by Ga in methanol aromatization
刘维桥 1雷卫宁 1尚通明 1陈旭红 1戴文娟 1王恒强 2任杰2
作者信息
- 1. 江苏技术师范学院化学与环境工程学院,江苏常州213001
- 2. 中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001
- 折叠
摘要
Abstract
ZSM-5 catalysts were modified by the addition of Ga through impregnation and hydrothermal methods respectively.X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,temperature-programmed desorption of ammonia（NH3-TPD）and scanning electron microscopy（SEM）techniques were employed to analyze the property of catalyst.The results show that two methods for Ga addition has little influence on the skeletal structure,pore structure of catalysts and morphology of catalyst particles,but they did have impact on the catalyst acidity.Ga modification by impregnation method has less influence on the surface acidity,and only slightly reduce the number of strong acid sites.Ga introduced by hydrothermal method increases the number of both weak and strong acid sites apparently.The catalytic performance of catalysts for methanol aromatization was studied in a fixed bed reactor.It can be found that the catalytic property of the HZSM-5 modified by Ga through hydrothermal method are better than that of the HZSM-5 modified by Ga through impregnation method.In addition,Ga has a positive effect to suppress the carbon deposition of HZSM-5 in methanol aromatization.关键词
HZSM-5/酸性/镓/甲醇芳构化Key words
HZSM-5/acidity/Ga/methanol aromatization分类
化学化工引用本文复制引用
刘维桥,雷卫宁,尚通明,陈旭红,戴文娟,王恒强,任杰..Ga改性的HZSM-5分子筛甲醇芳构化催化反应性能[J].化工进展,2011,30(12):2637-2641,5.
