N-甲基二乙醇胺吸收CO_2的热力学模型研究  

Study on thermodynamic model for CO_2 adsorption in aqueous N-methyldiethanolamine solution

作　　者：郑园园 

机构地区：[1]南化集团研究院江苏省企业院士工作站,江苏南京210048

出　　处：《能源化工》2015年第3期48-53,共6页Energy Chemical Industry

基　　金：国家科技支撑计划项目课题五(2012BAC24B05)和课题一(2012BAC24B01)

摘　　要：采用非随机双流体电解质(E-NRTL)热力学模型,通过拟合N-甲基二乙醇胺(MDEA)的热容数据,MDEA-H2O二元体系的气液平衡、热容和混合热数据,以及MDEA-H2O-CO2三元体系的气液平衡、热容和吸收热数据,建立了MDEA吸收CO2的热力学模型,并将气液平衡、热容、混合热和吸收热数据的模型计算值与试验值进行了比对。MDEA-H2O-CO2体系的核磁共振(NMR)组成数据被用来验证模型的准确性。The thermodynamic model for CO2 adsorption in aqueous N-methyldiethanolamine（ MDEA） solution is developed using the electrolyte nonrandom two-liquid model. The heat capacity data are regressed for MDEA,the vapor-liquid equilibrium（ VLE）,heat capacity and excess enthalpy data are regressed for the MDEA-H2 O binary system,and the VLE,heat capacity and heat of adsorption data are regressed for the MDEA-H2O-CO2 ternary system. The calculated VLE,heat capacity,excess enthalpy and heat of adsorption for the MDEA-H2O-CO2 ternary system is compared with experimental data. The model is validated by the NMR spectroscopic data.

关 键 词：N-甲基二乙醇胺 CO2吸收 热力学模型 非随机双流体电解质 模拟 

分 类 号：TQ028.14[化学工程]