perature. Over most of the temperature range, the deviation curve for Scatchard et al., who estimated their temperature uncertainty as ±0.01 K, falls within these limits. The systematic difference between our results and theirs probably lies in the calibration of their 20-junction thermopile. The same comparator and scale were used In

The Solution model of hydrogen in hydrocarbons is presented for the calculation of Henry's constant. This model includes the following considerations. i) To avoid the large volume change of the gas in the dissolving process, the gas before mixing *

Gas-liquid partition chromatography with the hypothetical perfect gas perturbation method was used to determine the infinite dilution K-values for carbon dioxide and hydrogen sulfide in the methane-n-octane system at 20°, 0°, -20°, and -40°C and at nine pressures from 20 to 1500 psia. Carbon dioxide and hydrogen sulfide showed positive deviation from Raoult's law.Vapor-liquid equilibrium data are needed for absorber calculations on natural gas systems to follow the distribution of naturally occurring nonhydrocarbon components. Infinite dilution data are useful not only for design calculations but also for the theoretical development of correlations. The data presented here are for the nonhydrocarbons carbon dioxide and hydrogen sulfide, each in the methane-ra-octane system at low temperature and high pressure. EXPERIMENTAL Method. Gas-liquid partition chromatography (GLPC) has proven satisfactory for vapor-liquid equilibrium measurements.

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The adsorption of a binary gaseous mixture of ethane and propane on the carbon molecular sieve MSOSA was measured at temperatures of 5, 30, and 50 °C and a pressure of 100 mmHg and at 30 °C and 300 mmHg. The amount of propane adsorbed was much higher than the value predicted by the method of Myers and Prausnltz. This preference for propane was greater at lower temperatures but did not change with pressure. Activity coefficients of the adsorbed phase calculated by the Myers-PrausnHz method showed that, at very high concentrations of propane, ethane dissolved In the adsorbed propane In the micropores rather than adsorbed on the surface of the adsorbent.