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Journal of Applied Sciences
Year: 2014  |  Volume: 14  |  Issue: 22  |  Page No.: 3055 - 3062

Water/Carbon Dioxide Phase Equilibria Using Thermodynamic Perturbation Theory

W.P. Yong and M. Awang    

Abstract: The Cubic Plus Association (CPA) and the Statistical Associating Fluid Theory (SAFT) are theoretically derived based on perturbation theory using Wertheim theory by considering the effect of hydrogen bonding on thermodynamic properties of associating fluids. These EoS are applied to predict the phase equilibrium of pure water and carbon dioxide system at different temperatures and pressures. A comparison has been made between those EoS and the widely used cubic EoS such as Soave-Redlich Kwong (SRK) and Peng-Robinson (PR) EoS. Satisfactory predictions are obtained for CPA and SAFT EoS and the analysis of results show that these theoretically derived models can successfully predict the pure water and carbon dioxide system even with zero binary interaction parameter.

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