THE paper presents a treatment of the thermodynamics of the methane-steam-hydrogen-carbon monoxide-carbon dioxide-carbon system which has been extended to cover determination of the conditions of temperature, pressure, and oxygen-methane ratio for maximum yield of synthesis gas per mole of oxygen and per mole of methane.Numeri-

One method of predicting vaporization equilibrium ratios for the components of a multicomponent mixture is through the use of standard state liquid fugacities, standard state vapor fugacities, liquid phase activity coefficients, and vapor phase activity coefficients. The relationship among these variables will be shown.It is the purpose of this paper to present a method for evaluating the fugacities of the components of a multicomponent liquid mixture which is i n equilibrium with its vapors; t o present a method for evaluating the standard state fugacities of hypothetical liquids and to disclose these values for methane and ethane up to a reduced temperature of 1.6 and values for propane up t o a reduced temperature of 1.3; to Present the coincident derived values of the vaporization ' I parameters; and to show correlations of these equilibrium constants, Z factors, a-nd solubility values.The following definitions apply to the nonideal behavior of liquids and vapors:When the vapors and the liquid of a multicomponent mixture are in equilibrium at a given temperature and pressure, ( f i ) , and (fi). are equal. At equilibrium then through Equations (1) and ( 2 ) The ratio of the standard state fugacities is usually expressed as and is named the vaporization eqziilibrium constant. Equation (

In an earlier paper Hoffman et al.( 1 ) discussed a method for predicting the vaporization equilibrium ratios, defined as y/x, for the components of a multicomponent mixture through use of standard state liquid fugacities, standard state vapor fugacities, liquid phase activity coefficients, and vapor phase activity coefficients. As used here and throughout this paper, standard state fugacity means the fugacity of a pure component at the temperature and pressure of the system. The relationship among these variables has been shown to be

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