中北大学学报（自然科学版）2023，Vol.44Issue(6)：654-661,8.DOI:10.3969/j.issn.1673-3193.2023.06.009
乙二醇与甲醇脱水的非均相热力学平衡分析
Heterogeneous Thermodynamic Equilibrium Analysis of the Dehydration of Ethylene Glycol With Methanol to Ethylene Glycol Methyl Ether
摘要
Abstract
The problem of excess production capacity of ethylene glycol and methanol in condition of the rapid development of the coal chemical industry,made the dehydration conversion of the two into ethyl-ene glycol methyl ether become a research hotspot.The thermodynamic equilibrium calculations for the heterogeneous dehydration process of ethylene glycol and methanol were optimized based on the Gibbs free energy minimization principle using a modified genetic algorithm in the manuscript.Under the con-ditions of ethylene glycol feed of 100 mol,20-300℃,0.1-0.7 MPa,and the feed amount of substance ratio of methanol to ethylene glycol is 1∶2-6∶1,the effects of temperature,pressure,and feed amount of substance ratio on the equilibrium conversion of reactants,product selectivity,and gas-liquid phase e-quilibrium composition were examined.The results show that under the conditions of 0.3 MPa and feed amount of substance ratio of 3∶1,within the gas-liquid coexistence range of 60-120 ℃,the highest con-version of ethylene glycol and selectivity of ethylene glycol dimethyl ether are 99.99％and 99.97％,re-spectively.Increasing pressure affects the temperature range in which conversion and selectivity change,but the overall trend remains unchanged.Increasing the feed amount of substance ratio increases the conversion of ethylene glycol to near 100％and improves the selectivity of ethylene glycol dimethyl e-ther,and narrowes the temperature range of the heterogeneous range from 40 ℃ to 20 ℃.关键词
乙二醇/甲醇/乙二醇醚/非均相/热力学Key words
ethylene glycol/methanol/ethylene glycol ether/heterogeneous phase/thermodynamics分类
化学化工引用本文复制引用
吕捷,贾广信,张叶,郭玉珊,田锴,谢亚宁,贾海臣..乙二醇与甲醇脱水的非均相热力学平衡分析[J].中北大学学报（自然科学版）,2023,44(6):654-661,8.基金项目
山西省自然科学基金面上项目(201901D111177) （201901D111177）
煤炭转化国家重点实验室开放基金(J20-21-604) （J20-21-604）
