变阱宽方阱链流体状态方程应用于CO_(2^-)物理吸收溶剂系统  

Equation of state of square-well chain fluid with variable range for CO_2 + physical absorption solvent

作　　者：何昌春[1] 朱虹[1] 彭昌军[1] 刘洪来[1] 胡英[1] 

机构地区：[1]化学工程联合国家重点实验室华东理工大学化学系,上海200237

出　　处：《中国科学：化学》2012年第3期282-290,共9页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(21136004);国家重点基础研究发展计划(2009CB219902)资助

摘　　要：采用变阱宽方阱链流体(SWCF-VR)状态方程关联了CO2在几种常规物理吸收溶剂中的溶解度数据,得到了二元交互作用参数,建立了二元交互作用参数与温度的关联式.结果表明,采用一个二元交互作用参数,SWCF-VR方程均能很好地描述CO2在常规流体中的溶解度,尤其能满意再现甲醇低温洗工艺中CO2-甲醇的相行为.利用建立的二元交互作用参数与温度的关联式,可将SWCF-VR状态方程拓展应用于预测二元系统气液两相的密度以及CO2-物理吸收溶剂多元系统的气液平衡.The experimental solubilities of CO2 in several conventional physical absorption solvents were correlated with equation of state for square-well chain molecules with variable interaction range （SWCF-VR EoS）, where the binary interaction parameters are functions of temperatures. The results show that the SWCF-VR EoS with only one binary interaction parameter can satisfactorily describe the solubilities of CO2 in the solvents, especially for the behavior of CO2 ＋ methanol in the Rectisol process. By using the relationship between the binary interaction parameter and temperature, the SWCF-VR EoS can be extended to the prediction of the densities of the gas and liquid phases in the binary systems and gas-liquid equilibria in the ternary systems containing CO2 and the physical absorption solvents.

关 键 词：状态方程 二氧化碳 溶解度 相平衡 

分 类 号：X701[环境科学与工程—环境工程]