Multiparameter corresponding‐states correlation of coal‐fluid thermodynamic properties

A multiparameter corresponding‐states correlation has been developed to describe fossil‐fluid thermodynamic properties needed to design fluid‐flow, heat‐exchange, and other unit operations in coal‐liquefaction plants. Three equation‐of‐state parameters, a molecular‐size/separation parameter, a molecular‐energy parameter, and a molecular‐orientation parameter are used to characterize nonpolar and slightly polar aromatic hydrocarbons. A conformal‐solution model is developed for predicting thermodynamic properties of coal‐derived mixtures.