Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
202624 | Fluid Phase Equilibria | 2010 | 5 Pages |
In this work, the interaction energy term of the Sanchez–Lacombe equation of state (SL EOS) was modified to take into account the temperature dependence of hydrogen bonding and ionic interactions. A simple function was used in the form of the Langmuir equation that reduces to the original SL EOS at high temperature. Comparisons are shown between the ɛ*-modified SL EOS and the original SL EOS. The ɛ*-modified SL EOS could represent volumetric data for the group of non-polar fluids, polar fluids and ionic liquids to within an absolute average deviation (AAD) of 0.85%, 0.51%, and 0.054%, respectively whereas, the original Sanchez–Lacombe EOS gave AAD values of 0.99%, 1.2%, and 0.21%, respectively. The ɛ*-modified SL EOS provides remarkably better PVT representation and can be readily applied to mixtures.