文献类型：期刊文献

中文题名：甲醇气相脱水制二甲醚过程热力学分析

英文题名：Thermodynamic Analysis on Dimethyl Ether Synthesis via Methanol Vapor Phase Dehydration

作者：杨学萍[1];刘殿华[2];杨为民[1]

机构：[1]中国石油化工股份有限公司上海石油化工研究院,上海201208;[2]华东理工大学化工学院,上海200237

年份：2008

卷号：24

期号：6

起止页码：535

中文期刊名：化学反应工程与工艺

外文期刊名：Chemical Reaction Engineering and Technology

收录：CSTPCD;;EI(收录号：20090811913804);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：甲醇;脱水;二甲醚;热力学

外文关键词：methanol; dehydration; dimethyl ether; thermodynamics

摘要：对甲醇气相脱水制二甲醚反应体系进行了热力学分析。计算了甲醇脱水制二甲醚反应的反应热及其吉布斯自由能与温度之问的关系。随着反应温度的升高,甲醇脱水制二甲醚反应的吉布斯自由能变化值逐渐减小,可见温度过高不利于二甲醚的生成。考察了反应温度和进料组成等因索对甲醇脱水反应化学平衡的影响以及进料含水量对反应绝热温升的影响。结果表明,进料中水的存在不利于平衡向脱水方向进行,但可降低反应的绝热温升。
Thermodynamic analysis was carried out for the reaction system of dimethyl ether （DME） synthesis via methanol vapor phase dehydration, in which the reaction heat and relationship between Gibbs free energy and temperature for possible reactions were calculated. Since the change of Gibbs free energy for methanol dehydration decreases gradually when reaction temperature is elevated, high temperature restraints DME formation. The effect of temperature and H20 concentration in feed on equilibrium as well as that of H2O content on adiabatic temperature rise was investigated so as to provide groundwork for the reactor simulation and development. Water in feed holds back methanol dehydration, but it helps to lower adiabatic temperature rise.