MODEL OF VAPOR-LIQUID-EQUILIBRIA FOR AQUEOUS ACID GAS-ALKANOLAMINE SYSTEMS .2. REPRESENTATION OF H2S AND CO2 SOLUBILITY IN AQUEOUS MDEA AND CO2 SOLUBILITY IN AQUEOUS MIXTURES OF MDEA WITH MEA OR DEA
MODEL OF VAPOR-LIQUID-EQUILIBRIA FOR AQUEOUS ACID GAS-ALKANOLAMINE SYSTEMS .2. REPRESENTATION OF H2S AND CO2 SOLUBILITY IN AQUEOUS MDEA AND CO2 SOLUBILITY IN AQUEOUS MIXTURES OF MDEA WITH MEA OR DEA
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DOI：
10.1021/ie00051a016
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发表时间：
1991-03-01
影响因子：
4.2
通讯作者：
CHEN, CC
中科院分区：
文献类型：
--
作者：
AUSTGEN, DM;ROCHELLE, GT;CHEN, CC
将前期工作中建立的描述硫化氢和二氧化碳在单乙醇胺(MEA)和二乙醇胺(DEA)水溶液中的溶解度的物理化学模型扩展到包括甲基二乙醇胺(MDEA)与MEA或DEA的混合物。该模型的框架同时基于液-液(相)平衡和气-液(相)平衡。活度系数用处理长程静电相互作用和短程二元相互作用的电解质-NRTL方程表示。用文献报道的二元和三元体系MDEA数据拟合了模型中可调的二元相互作用参数。在很宽的二氧化碳分压范围内，在40℃和80℃的温度下测量了MDEA与MEA或DEA的水混合物中CO2的溶解度。该模型对数据的描述效果较好，特别是在中低酸性气体负荷下。
A physicochemical model developed in earlier work for representing H2S and CO2 solubility in aqueous solutions of monoethanolamine (MEA) and diethanolamine (DEA) was extended to include the mixtures of methyldiethanolamine (MDEA) with MEA or DEA. The framework of the model is based upon both liquid-phase chemical equilibria and vapor-liquid (phase) equilibria. Activity coefficients are represented with the electrolyte-NRTL equation treating both long-range electrostatic interactions and short-range binary interactions. Adjustable binary interaction parameters of the model were fitted on binary and ternary system MDEA data reported in the literature. The solubility of CO2 in aqueous mixtures of MDEA with MEA or DEA was measured at 40 and 80-degrees-C over a wide range of CO2 partial pressures. Representation of the data by the model is good, especially at low to moderate acid gas loadings.