关键词: 二甲醚, 乙酸甲酯, 乙醇, 热力学分析, 协同效应, 二甲醚, 乙酸甲酯, 乙醇, 热力学分析, 协同效应

Abstract: Both standard formation enthalpy and standard Gibbs free energy of dimethyl ether (DME) and methyl acetate were estimated with the Benson group contribution method. Reaction enthalpy change，reaction entropy change，reaction Gibbs free energy change and equilibrium constant of reactions of ethanol synthesis (DME carbonylation，MA hydrogenation，overall reactions) were calculated and analyzed. On this basis，effects of reaction temperature，reaction pressure，raw material ratio on DME conversion were investigated. The synergistic effect between the two reactions of ethanol synthesis were investigated at different concentrations of H2 under the conditions of 413K，normal pressure，CO∶DME=1. A moderate reaction temperature (lower than 493K)，3MPa，n(CO)∶n(DME)=1 were beneficial to ethanol synthesis and the equilibrium conversion in MA hydrogenation increased greatly due to this synergistic effect.

Key words: dimethyl ether, methyl acetate, ethanol, thermodynamic analysis, synergistic effect, dimethyl ether, methyl acetate, ethanol, thermodynamic analysis, synergistic effect