Molecular structure effects on the theory of corresponding states

Abstract

A method is proposed to take into account deviations from the principle of corresponding states due to shape and size effects. Factors for use with the critical constants as reducing parameters are determined for the n-paraffin hydrocarbon series, methane through normal octane for the gas phase from second virial coefficient data. The prediction of pure component thermodynamic properties is evaluated. Applications to a vapor-liquid equilibrium calculation procedure based on composition dependent pseudo-criticals and the corresponding states theory are discussed.