基于Aspen Plus软件,对不同文献中碳酸二甲酯-甲醇体系的二元交互参数进行了整理、对比及分析,结合文献中的实验数据,筛选出较为合理、准确的二元交互参数。对不同压力下碳酸二甲酯-甲醇体系的共沸情况进行了热力学分析,验证了变压精馏分离该共沸体系的热力学可行性,搭建了碳酸二甲酯-甲醇变压精馏工艺,并进行了高压塔及低压塔的参数优化分析。

Based on Aspen Plus software,binary interaction parameters of dimethyl carbonate-methanol system in different public literatures are sorted out,compared and analyzed.More reasonable and accurate binary interaction parameters are screened by combining with experimental data in literatures.Subsequently,thermodynamic analysis is performed on the azeotrope situation of dimethyl carbonate-methanol system under different pressures,which verifies the thermodynamic feasibility using pressure swing distillation to separate this azeotrope system.The pressure swing distillation process for dimethyl carbonate-methanol is established,and the parameter optimization analysis is carried out for high pressure column and low pressure column.