基于Aspen Plus的草酸二甲酯合成工段工艺参数优化

针对CO气相催化偶联制草酸二甲酯（DMO）-草酸酯加氢合成乙二醇（EG）的生产新工艺,应用Aspen Plus软件,在物性常数估算、模型建立的基础上,考察进料板位置、回流比等对CO制DMO工段主要工艺单元装置甲醇吸收精馏塔T-101的产品分布及能耗的影响,并进一步进行了羰化全流程模拟。结果表明,T-101的气体进料板数、摩尔回流比和吸收剂甲醇用量的最佳值分别为10、0.2和6 000 kg/h。全流程模拟显示,888 kmol/h的CO、100.65 kmol/h的O2和841.07 kmol/h的CH3OH可生产189.79 kmol/h的草酸二甲酯,同时反应放出的热量得以有效利用。

Process parameters optimization .of DMO synthesis section based on Aspen Plus

Aimed at a novel non-petroleum technology, Dimethyl oxalate （DMO） by vapor phase cat- alytic coupling reaction of CO-ethylene glycol （EG） by hydrogenation synthesis of oxalate, this paper starts with investigating the effect of the process parameters, including the location of the gas feed board and reflux ratio of the main equipment （methanol absorption-distillation tower T - 101 ） on the products distribution and the energy consumption using Aspen Plus software and based on estimation of physical parameters and modeling and proceeds with simulating and optimizing the whole process for production of dimethyl oxalate（DMO） by vapor phase catalytic coupling reaction of CO. The results show that the suit- able feed stage, the reflux ratio, and mass flow of methanol of T - 101 are 10, 0.2 and 6 000 kg/h re- spectively. Whole process simulation results show that CO （ 888 kmoL/h ）, 02 （ 100.65 kmoL/h ） and cn3 0H（841.07 kmol/h） can produce dimethyl oxalate （189.79 kmoL/h）, together with the effective use of the heat released by the reaction.