基于密度模型关联溶质在超临界CO2中的溶解度  

A density-based model for correlation of solubility of some compounds in supercritical CO2

作　　者：卞小强[1] 杜志敏[1] 汤勇[1] 贾莎[1] 徐锋[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《天然气化工—C1化学与化工》2011年第1期75-78,共4页Natural Gas Chemical Industry

基　　金：国家油气重大专项（No：2008ZX05016-001）; 国家自然科学基金项目（No：50774062）

摘　　要：基于平衡常数k和CO2密度ρ1曲线关系,提出了一个关联溶质在超临界CO2中溶解度改进模型。与常用的Chrastil、Adachi-Lu、del Valle-Aguilera、Sparks模型关联18种溶质在超临界CO2中溶解度对比表明：该模型精度最高,其绝对平均偏差的平均值（AAD）为5.81%,而Chrastil、Adachi-Lu、del Valle-Aguilera和Sparks模型的AAD分别为10.66%、7.38%、9.91%和7.00%。从而为溶质在超临界CO2中的溶解度计算提供新的思路。Based on the relationship of an association equilibrium constant k and the supercritical carbon dioxide（SC-CO2） density ρ1,a modified density-based model for correlation of the solubilities of some compounds in SC-CO2 is established.The comparison with Chrastil,Adachi-Lu,del Valle-Aguilera,and Sparks models shows that the proposed model is in the best accordance with experimental data,and that average absolute relative discrepancy is 5.81%,while the average absolute relative discrepancies for Chrastil,Adachi-Lu,del Valle-Aguilera,and Sparks model are 10.66%,7.38%,9.91% and 7.00%,respectively.So,it may provide a method for calculation of the solubilities of solutes in SC-CO2.

关 键 词：溶质 二氧化碳 溶解度 模型 超临界 

分 类 号：O645[理学—物理化学]