Partial enthalpies of components in gas mixtures via Redlich-Kwong equation of state
Article first published online: 17 JUN 2004
Copyright © 1963 American Institute of Chemical Engineers
Volume 9, Issue 1, pages 116–120, January 1963
How to Cite
Edmister, W. C., Thompson, R. E. and Yarborough, L. (1963), Partial enthalpies of components in gas mixtures via Redlich-Kwong equation of state. AIChE J., 9: 116–120. doi: 10.1002/aic.690090126
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Accepted: 10 JUL 1962
- Manuscript Revised: 2 JUL 1962
- Manuscript Received: 7 FEB 1962
Enthalpies of components in ideal gas mixtures can be computed from existing data. However the isothermal effects of pressure and composition on partial enthalpies of mixture components have not been completely characterized. An investigation of the application of the Redlich-Kwong equation of state to the calculation of partial enthalpies is reported here. Methods are developed for convenient hand calculations and for computations on the IBM-650.
Calculated partial enthalpies are compared with values derived from experimental P-V-T-C data for binary hydrocarbon mixtures. The calculated values agree fairly well with the derived data for pressures up to 2,500 lb./sq. in. abs. Best agreement is generally obtained when the mixture is well above the critical temperature of the more abundant component. No consistent bias was indicated however.