石油化工2011，Vol.40Issue(4)：403-407,5.
草酸二乙酯和草酸二甲酯加氢反应热力学对比分析
Comparative Thermodynamic Analysis of Hydrogenations of Diethyl Oxalate and Dimethyl Oxalate
摘要
Abstract
Standard enthalpies of formation △H-f, standard Gibbs free energies of formation △fG-298 and molar heat capacities at constant pressure Cpm of diethyl oxalate(DEO) , ethyl glycolate, dimethyl oxalate(DMO) and methyl glycollate(MG) etc. , and further the enthalpy changes △rHT Gibbs free energy changes △rGT and equilibrium constants Kp in hydrogenations of DEO and DMO under 473 -513 K and 1.0-3.5 Mpa were calculated by different methods, including Benson group contribution method, Constantinou-Gani method and Rihani-Dorasiwamy method. The results show that the hydrogenations of DEO and DMO are spontaneous exothermic reactions, except for the production of ethylene glycol from MG, which is not spontaneous at low pressure and high temperature. Low temperature and high pressure are propitious to synthesis of ethylene glycol. Kp of DEO hydrogenation is higher than that of DMO hydrogenation.关键词
草酸二乙酯/草酸二甲酯/乙二醇/加氢/热力学Key words
diethyl oxalate/dimethyl oxalate/ethylene glycol/hydrogenation/thermodynamics分类
化学化工引用本文复制引用
张旭,王保伟..草酸二乙酯和草酸二甲酯加氢反应热力学对比分析[J].石油化工,2011,40(4):403-407,5.基金项目
国家“十一五”科技支撑计划项目(2006 BAE02B00). （2006 BAE02B00）
