Adsorption equilibria for methane, ethane, ethylene, and carbon dioxide and for mixtures of these hydrocarbons on activated carbon were measured volumetrically at 212.7, 260.2, and 301.4 K, at pressures up to about 35 atm, for binary gas-phase compositions of about 0.25, 0.50, and 0.75 mole fraction of the first component, and for ternary gas-phase compositions of about 0.60-0.20-0.20, 0.25-0.50-0.25, and 0.20-0.20-0.60 mole fraction of methane, ethane, and ethylene, respectively. A method is proposed for the prediction of multicomponent adsorption equilibria from pure gas adsorption data. This method is based on the Polanyi potential theory of adsorption. It is similar to the predictive method developed by Grant and Manes for binaries. A single correlation or characteristic curve was constructed for all the pure gas adsorption data. A characteristic curve based on all the mixture adsorption data was shown to be essentially superimposable on that of the pure components. This finding permitted a fair estimation of mixture adsorption data from
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