High-pressure Solubilities of Carbon Dioxide and Ethane in Selected Paraffinic, Naphthenic and Aromatic Solvents

Abstract

The isothermal solubilities of carbon dioxide in four solvents, benzene, n-decane, n-dodecane and n-tetradecane, were measured at temperatures ranging from 40 to 100�C. The isothermal solubilities of ethane were measured in n-decane at temperatures ranging from 100 to 280�F, in one- and two-ring naphthenic solvents (cyclohexane, trans- Decalin) at temperatures of 50, 100 and 150�C, and in 1-, 2-, 3- and 4-ring aromatic solvents (benzene, naphthalene, phenanthrene and pyrene) at temperatures ranging from 50 to 160�C. Binary interaction parameters for use in the Soave-Redlich-Kwong and Peng-Robinson equations of state have been optimized by regression of the obtained data for each system. Comparisons have been made regarding the accuracy of these equations in fitting the data with the use of one and two binary interaction parameters. Also compared are the results of the use of binary interaction parameters obtained through single and multipleisotherm regressions of the data.