Phase equilibria of associating fluid mixtures using the perturbed-hard-sphere-chain equation of state combined with the association model |
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Authors: | Bong-Seop Lee Ki-Chang Kim |
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Affiliation: | (1) Department of Chemical Engineering, Kangwon National University, 192-1, Hyoja 2-dong, Chuncheon 200-701, Korea |
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Abstract: | For developing the equation of state which can be applicable to associating fluids, the Perturbed-Hard-Sphere-Chain-Association
(PHSC-AS) equation of state is proposed by incorporating the association term of the SAFT model into the PHSC equation of
state which has been widely used to describe phase equilibria for the fluid system containing a large molecule such as polymer.
In this work, two different types of PHSC models have been examined. One is the original model proposed by Song et al., and
the other is the modified model by Kim and Bae whose chain term was replaced with that of the SAFT model. As a result, two
types of PHSC-AS models are obtained, and applied to the calculation of phase equilibria for the binary system containing
a self-associating compound such as alcohol, amine and carboxylic acid, etc. The calculated results of vapour-liquid equilibria
are in good agreement with the experimental data. The proposed models (PHSC-AS) are also compared to the PC-SAFT model. |
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