气体在电解质水溶液中高压溶解度的研究  

Study on Gas Solubilities in Aqueous Electrolyte Solutions under High Pressures

作　　者：高光华[1] 谭志强[1] 于养信[1] 朱文涛[2] 

机构地区：[1]清华大学化学工程系,北京100084 [2]清华大学化学系,北京100084

出　　处：《高校化学工程学报》1999年第4期291-298,共8页Journal of Chemical Engineering of Chinese Universities

摘　　要：采用非原始的平均球近似模型考虑电解质水溶液中离子-离子、离子-偶极和偶极-偶极相互作用，引入色散能作为微扰项从而导出流体混合物的Helmholtz自由能表达式。水的分子参数从纯水的饱和蒸汽压数据求得，阴、阳离子参数通过拟合离子的平均活度系数实验数据而得，气体分子参数由气体在纯水中的溶解度数据确定。对于气体-水-电解质复杂体系，未引入二元相互作用参数，应用本文模型仍可较好地预测气体在电解质水溶液中的高压溶解度。Gas solubility in aqueous electrolyte solutions has been studied under high pressure. Usingnon-primitive mean sphere approximation(MSA) method and perturbation theory the expression ofHelmholtz free energy for the gas-salt-water system was derived. Then, the chemical potentials ofsystem were deduced. The parameters of water were regressed from saturated vapor pressure data, andthe parameters of ions and gases were determined from solubility of gas and activity coefficient data ofaqueous electrolyte solutions. The proposed model can be used to predict the solubilities of gases inaqueous electrolyte solutions fairly good.

关 键 词：气体 溶解度 电解质溶液 高压溶解度 分子热力学 

分 类 号：O646.15[理学—物理化学]