文献类型：期刊文献

中文题名：瞬变应答法研究丁烯氧化脱氢的反应机理

英文题名：Studies on Mechanism of Oxidative Dehydrogenation of Butenes by Transient Response Method

作者：沈瀛坪[1];朱海东[1];周飞[1];孙立行[1]

机构：[1]联合化学反应工程研究所华东化工学院分所

年份：1991

卷号：17

期号：3

起止页码：265

中文期刊名：华东化工学院学报

收录：国家哲学社会科学学术期刊数据库;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：脱氢;丁烯;氧化;瞬变应答

外文关键词：reaction; mechanism; transient response; oxidative dehydrogenation; butenes; butadiene

摘要：在铁系催化剂上研究了文题的反应机理。通过瞬变应答实验和对响应曲线的分析,证实丁烯、丁二烯和氮在催化剂上发生竞争吸附,其反应机理是吸附氧和吸附丁烯间进行的Langmuir-Hinshelwood型机理,反应的控制步骤是氧吸附控制。瞬变应答实验也揭示出催化剂表面状态存在滞后特性,反应速率和选择性与预处理条件有关。
The mechanism of oxidative dehydrogenation (OXD) of butenes over ferrite catalyst was studied by transient response method at temperatures ranging from 360℃ to 440℃. The analysis of response curves showed that competitive absorption occurs among butenes, butadiene and nitrogen over active sites of the catalyst. The reaction mechanism is of the Langmuir-Hinshelwood type pertaining to the reaction between absorbed oxygen and absorbed butenes; the controlling step in OXD is the absorption of oxygen. Retardation of the surface active sites of the catalyst by the reaction atmosphere was revealed by the transient response method. The reaction rate and selectivity are related to the pretreatment of the reaction atmosphere.