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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2016, Volume 67, Issue 10,





ADRIAN CRISCIU, SERGIU SIMA, ANCA SIMONA DEACONU, AUREL CHIRILA, DRAGOS DEACONU, CATINCA SECUIANU, VIOREL FEROIU
Modelling of the Carbon Dioxide + Cyclohexane Binary
System with Cubic Equations of State

Abstract:

This study compares the ability of different thermodynamic models to calculate the phase behaviour of the carbon dioxide + cyclohexane binary system. All available literature data (47 data sets, 348 experimental points) for the aforementioned system were modelled with the General Equation of State (GEOS) and Soave-Redlich-Kwong (SRK) equations of state coupled with classical van der Waals (two-parameter conventional mixing rule, 2PCMR) mixing rules or with Huron-Vidal (HV) mixing rules and a reduced UNIQUAC model. All models perform similarly when correlating the data and the absolute average deviations in pressure (AADP, %) are small, though sometimes the type of phase behaviour is wrong. A semi-predictive approach is also shown, which leads to the correct type of phase behaviour and to higher errors in the predicted pressures. Keywords: carbon dioxide, cyclohexane, GEOS, SRK, EoS, high-pressures


Issue: 2016, Volume 67, Issue 10
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