Peng-Robinson equation of state（PR EOS）was chosen for modeling the thermodynamic be-havior of supercritical（SC）-CO<sub>2</sub>/Solid systems.The necessary critical constants and acentric factorof the s...Peng-Robinson equation of state（PR EOS）was chosen for modeling the thermodynamic be-havior of supercritical（SC）-CO<sub>2</sub>/Solid systems.The necessary critical constants and acentric factorof the solute were obtained by the Sigmund and Trebble（1992）method based on the molecular weightand boiling temperature,and the vapor pressure of the solute was calculated by its meltingtemperature and heat of fusion.This approach compared very favorably with the conventional corres-ponding state theory,but without using critical constants and vapor pressure of solutes.Four mixingrules were tested for the calculation of solid solubility in SC-CO<sub>2</sub>.van der Waals（vdW）mixing rulewith one parameter was considered to be most suitable for the estimation of solubility.A simplecorrelation was developed for the SC-CO<sub>2</sub>/solid binary interaction coefficient k<sub>ij</sub> with the meltingtemperature of pure solutes.The solubilities of solids in SC-CO<sub>2</sub> were estimated for eleven binarysystems at various temperatures,the total absolute展开更多
基金Supported by the National Natural Science Foundation of China and Natural Science Foundation of Jiangsu Province.
文摘Peng-Robinson equation of state（PR EOS）was chosen for modeling the thermodynamic be-havior of supercritical（SC）-CO<sub>2</sub>/Solid systems.The necessary critical constants and acentric factorof the solute were obtained by the Sigmund and Trebble（1992）method based on the molecular weightand boiling temperature,and the vapor pressure of the solute was calculated by its meltingtemperature and heat of fusion.This approach compared very favorably with the conventional corres-ponding state theory,but without using critical constants and vapor pressure of solutes.Four mixingrules were tested for the calculation of solid solubility in SC-CO<sub>2</sub>.van der Waals（vdW）mixing rulewith one parameter was considered to be most suitable for the estimation of solubility.A simplecorrelation was developed for the SC-CO<sub>2</sub>/solid binary interaction coefficient k<sub>ij</sub> with the meltingtemperature of pure solutes.The solubilities of solids in SC-CO<sub>2</sub> were estimated for eleven binarysystems at various temperatures,the total absolute
