高校化学工程学报2017，Vol.31Issue(3)：592-599,8.DOI:10.3969/j.issn.1003-9015.2017.00.021
ZSM-35分子筛中模板剂的脱除对1-己烯骨架异构化反应性能的影响
Effects of Template Removal of ZSM-35 Zeolite on1-Hexene Skeletal Isomerization
摘要
Abstract
This study investigated physicochemical properties of ZSM-35 zeolites calcinatedunder different temperatures with template agents and their application in 1-hexane skeleton isomerization. The results show that calcination temperature difference leads to different removal percentages of the template agent. When the calcination temperature is below 450℃, the template agent is decomposed and cannot be completely removed, and the zeolites show high 1-hexene skeletal isomerization selectivity. When the calcination temperature is up to 550℃, the template agent is completely removed but the iso-olefines yield decreases significantly with high percentage of byproducts. BET, XRD, TPO, NH3-TPD, TG-DTG and Py-IR characterization suggests that the chamber walls covered by the template agent are exposed after template agent removal, which makes the specific surface area and total acid of the catalysts increase. Therefore, the average active site of the catalysts increases that results in the increase of conversion.However, the removal of the template agent results in more small mesopores which lead to more dimerization and copolymerization. Furthermore, the template agent removal can also lead to the generation of new L acid centers which increases side effects and results in lower catalyst selectivity.关键词
焙烧/模板剂/1-己烯/骨架异构Key words
calcination/template agent/1-hexene/skeletal isomerization分类
化学化工引用本文复制引用
龚艳,黄星亮,胡龙旺,孙仁山,代小平,字琴,曹中扬..ZSM-35分子筛中模板剂的脱除对1-己烯骨架异构化反应性能的影响[J].高校化学工程学报,2017,31(3):592-599,8.基金项目
国家自然科学基金(21576288). （21576288）
