中文摘要：

采用非随机双流体电解质（ENRTL）热力学模型，通过拟合单乙醇胺（MEA）的饱和蒸气压、热容数据，MEA和水（H2O）二元体系的汽液平衡、热容、混合热数据，以及二氧化碳（C02）在MEA水溶液中的溶解度数据，建立了MEA吸收CO2的热力学模型，并用核磁共振（NMR）组成数据成功地进行了验证。在此模型基础上，利用平衡级模型建立了MEA吸收／解吸CO2的过程模拟，利用文献中中试工厂数据验证了过程模拟的准确性。对于质量分数为30％的MEA溶液，固定吸收塔CO2去除率为90％的条件下，当吸收塔液气质量流率比值为2时，再沸器能耗最小，为3．64GJ·（tCO2）^-2。

英文摘要：

A thermodynamic model for monoethanolamine （MEA）-H20-CO2 was built using the electrolyte non-random two-liquid model. Over twenty parameters were regressed from the vapor pressure and heat capacity data for MEA, data of vapor-liquid equilibrium, heat capacity and heat of mixing for MEA-H20, and CO2 solubility data for MEA-H20-CO2 over a wide range of temperature, concentration and CO2 loading. The model was validated by the NMR speciation data and then used to build a process simulation for CO2 absorption/ desorption into 30%（mass） MEA. The simulation results match the pilot plant data in literature. For 30%（mass） MEA solution, when the CO2 removal rate in the absorber is 90%, the reboiler heat duty is the minimum by changing the mass flow ratio of liquid to gas in the absorber. The minimum reboiler heat duty is 3.64 GJ＇（t CO2）-l, when the ratio is 2.