文献类型：期刊文献

中文题名：酯化反应用阳离子交换树脂催化剂的失活机理研究

英文题名：Deactivation mechanism of cation resin catalyst for esterification of acetic acid and isopropanol

作者：熊婷[1];朱志华[1];张景靓[1];李平[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2012

卷号：20

期号：5

起止页码：36

中文期刊名：工业催化

外文期刊名：Industrial Catalysis

收录：CSTPCD

语种：中文

中文关键词：催化化学;阳离子交换树脂;醋酸异丙酯;失活机理;磺酸基团

外文关键词：catalytic chemistry; cation exchange resin; isopropyl acetate; deactivation mechanism;sulfoacid group

摘要：针对醋酸异丙酯催化合成过程存在的催化剂失活现象,采用"催速失活"方法考察了Fe3+对催化剂活性的影响,并对失活前后的阳离子交换树脂催化剂进行了扫描电镜观察、元素定碳分析、元素能谱鉴定、X射线荧光组成分析和X射线光电子能谱等表征。结果表明,反应介质中存在的Fe3+吸附到催化剂上,取代了磺酸基团中的H+,部分导致催化剂活性下降,磺酸基团的流失也是失活原因。
In order to reveal the deactivation mechanism of cation exchange resin catalyst, the effects of Fe^3＋ on the catalyst activity were investigated using ＇ acceleration deactivation＇ method. The structure and properties of the fresh and deactivated catalysts were characterized by SEM, element analysis, EDS, XRF and XPS techniques. The results showed that the Fe^3＋ adsorbed on the catalyst could replace the active H^＋ of sulfoacid group, which partly resulted in deactivation of the catalyst. Meanwhile, the partial loss of sulfoacid group from the catalyst was one of deactivation reasons as well.