文献类型：期刊文献

中文题名：二甲醚精馏塔实验研究与模拟计算

英文题名：Experiment and simulation of distillation process for dimethyl ether refining

作者：韩媛媛[1,2];张海涛[1];应卫勇[1];房鼎业[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,大型工业反应器工程教育部工程研究中心,上海200237;[2]华侨大学化工系,福建泉州362021

年份：2008

卷号：59

期号：5

起止页码：1184

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20082311304109);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：“十一五”国家科技支撑计划项目(2006BAE02B02);国家重点基础研究发展计划项目(2005CB221205)~~

语种：中文

中文关键词：二甲醚;精馏;模拟

外文关键词：dimethyl ether （DME） ; distillation; simulation

摘要：The distillation process is used for purifying dimethyl ether(DME),when one-step synthesis of DME from syngas is adopted.Experimental flow of distillation for DME refining was built and the results were measured under operation conditions.A mathematical model was presented to research the distillation process on the basis of equilibrium stage theory.The cyclical nested-iteration method in sequential convergence was developed for solving the model equations,since the liquid phase was non-ideal and the components had a big difference in boiling point under normal conditions.The model yielded satisfactory results for laboratory data and the simulation results showed that for distillate DME product with concentration no less than 99%(mole),the following operating conditions were recommended.The distillation process is at operating pressure 1.0 MPa,and the feed mass flow rate of less than 8.65 mol·m-2·s-1 is desirable.The distillation mixture is fed into the middle of the packing section and the reflux ratio is rigorously controlled in a certain range according to the DME concentration in feed.It is necessary to keep CO2 concentration in feed as low as possible in order to improve DME purity and yield.
The distillation process is used for purifying dimethyl ether （DME）, when one-step synthesis of DME from syngas is adopted. Experimental flow of distillation for DME refining was built and the results were measured under operation conditions. A mathematical model was presented to research the distillation process on the basis of equilibrium stage theory. The cyclical nested-iteration method in sequential convergence was developed for solving the model equations, since the liquid phase was non-ideal and the components had a big difference in boiling point under normal conditions. The model yielded satisfactory results for laboratory data and the simulation results showed that for distillate DME product with concentration no less than 99% （mole）, the following operating conditions were recommended. The distillation process is at operating pressure 1.0 MPa, and the feed mass flow rate of less than 8.65 mol · m^-2 · s ^-1 is desirable. The distillation mixture is fed into the middle of the packing section and the reflux ratio is rigorously controlled in a certain range according to the DME concentration in feed. It is necessary to keep CO2 concentration in feed as low as possible in order to improve DME purity and yield.