Journal of Colloid and Interface Science, Vol.173, No.1, 202-210, 1995
Henrys Law Gas-Solid Chromatography and Correlations of Virial-Coefficients for Hydrocarbons, Chlorofluorocarbons, Ethers, and Sulfur-Hexafluoride Adsorbed Onto Carbon
Gas-solid chromatography was used to determine the Henry’s law second gas-solid virial coefficients within the temperature range of 314-615 K for ethane, propane, butane, isobutane, pentane, hexane, heptane, chloromethane, dichloromethane, trichloromethane, tetrachloromethane, trichlorofluoromethane (Freon 11), chlorodifluoromethane (Freon 22), dichlorodifluoromethane (Freon 12),methyl ether, ethyl ether, and sulfur hexafluoride with Carbopack B, a microporous carbon adsorbent. The temperature dependence of the second gas-solid virial coefficients of these adsorbates was used in conjunction with analyses based on a graphical method, a single-surface numeric integration method, a single-surface analytic expression method, and a two-surface analytic expression method to determine the gas-solid interaction energies and other parameters. The interaction energies were correlated with a ratio of the critical temperature divided by the square root of the critical pressure. The four methods were compared in their abilities to successfully calculate second gas-solid virial coefficient values.