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Enthalpies of methane‐light hydrocarbon binary mixtures in the vapor phase
Author(s) -
Edmister Wayne C.,
Yarborough Lyman
Publication year - 1963
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690090220
Subject(s) - enthalpy , thermodynamics , chemistry , acentric factor , methane , equation of state , isothermal process , propane , hydrocarbon , hydrocarbon mixtures , binary system , binary number , organic chemistry , physics , arithmetic , mathematics
The isothermal effects of pressure and composition on the mixture and partial enthalpy differences of the methane‐propane binary were derived from PVTy data. A graphical and numerical technique was used to derive the enthalpy differences from 100° to 460°F. and 200 to 2,000 lb./sq. in. abs. for the complete composition range of the binary. The isothermal effects of pressure and composition on the mixture enthalpy data of the methane‐propane binary were also calculated with the Benedict‐Webb‐Rubin and the Redlich‐Kwong equations of state. The results of the three methods of calculation are compared. The comparison showed that the two‐constant Redlich‐Kwong equation of state is as good as the eight‐constant Benedict equation of state in the superheated vapor region. The data derived in this work were combined with other methane binary enthalpy data from the literature to construct a general correlation of the effect of pressure and composition on the enthalpy of methane‐light hydrocarbon binaries. The correlating parameters are the pseudo reduced temperature and pressure and a mole‐average acentric factor.