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A Perturbed-Chain SAFT Equation of State Applied to Mixtures of Short- and Long-Chain n‑Alkanes

Nasrifar, Khashayar (2013) A Perturbed-Chain SAFT Equation of State Applied to Mixtures of Short- and Long-Chain n‑Alkanes. Industrial Engineering Chemistry Research . ISSN 0888-5885 (In Press)

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Abstract

ABSTRACT: A simplified hard-chain dimer theory is employed with perturbed-chain statistical associating fluid theory (PCSAFT) in calculating the vapor pressures and saturated liquid volumes of pure n-alkanes from methane to n-eicosane. Compared to the original PC-SAFT, the developed model is in better agreement with the experimental vapor pressures and saturated liquid volumes of n-alkanes along the vapor−liquid coexistence curve and the critical properties from n-butane toward longer n-alkanes. Predicting the vapor−liquid equilibria (VLE) of binary mixtures containing methane and a long-chain n-alkane, the new model describes the mixtures more accurately than PC-SAFT. With no binary interaction parameter, the model adequately describes the experimental VLE data, in particular, near the critical points. In the prediction of the VLE of mixtures containing ethane, propane, n-hexane, and a long-chain n-alkane, the differences between the two models become less appreciable.

Item Type:Article
Subjects:T Technology > TP Chemical technology
Academic Subject One:Academic Department - Chemical Engineering - Separation Process
Academic Subject Three:petroleum engineering
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:9838
Deposited By: Unnamed user with email khashayar_nasrifar@petronas.com.my
Deposited On:11 Jul 2013 00:08
Last Modified:20 Mar 2017 01:59

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