文献类型：期刊文献

英文题名：Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration

作者：Bai, Ziyang[1];Ma, Hongfang[1];Zhang, Haitao[1];Ying, Weiyong[1];Fang, Dingye[1]

机构：[1]E China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：15

期号：2

起止页码：122

外文期刊名：POLISH JOURNAL OF CHEMICAL TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000327885000019)】；

基金：This work was supported by the National Key Technology R&D Program of China (2007BAA08B04). The authors gratefully acknowledge to those who contributed to this research.

语种：英文

外文关键词：dimethyl ether; methanol dehydration to DME; process simulation

摘要：The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR model of vapor phase. In order to validate the proposed model, the simulation results have been compared with the available data from a set of industrial production equipment with a production capacity of 200 000 tonnes per annum. A comparison between the calculated and measured results has proved that these results are satisfactory. The bed height and the volume of the catalytic bed are calculated aim at one million t/a DME yields and while taking account of high-purity DME production. After discussing the influence of feed stage location and reflux ratio for DME product purity, the suitable unit operation conditions are chosen. Accordingly, accurate process simulation results provide the basis and guidance for an improvement and development of the similar industrial device.