Modelling acid gas mixtures of polar aprotic solvents and CO2 with the Cubic Plus Association equation of state
作者： Luis A. Follegatti-Romero , Cláudio A. Oller do Nascimento , Xiaodong Liang
DOI: 10.1016/J.SUPFLU.2020.105052
关键词: van der Waals force 、 Acid gas 、 Thermodynamics 、 Solvation 、 Mixing (physics) 、 Polar 、 Equation of state 、 Vapor pressure 、 Bubble 、 Materials science
摘要: Abstract The Cubic Plus Association (CPA) equation of state and the Soave–Redlich–Kwong (SRK) coupled to Mathias–Copeman volume correction parameters were used correlate vapor pressures densities pure polar aprotic solvents (PAS). It is shown that CPA model (with 2B scheme) performed better than inert scheme), SRK its modifications in all cases for pressure densities. performance two mixing rules, namely van der Waals one–fluid (vdW1f) Huron–Vidal (HV) evaluated these models on correlating bubble–point CO2 + PAS mixtures. CPA–HV performs best at several temperatures, with global average absolute deviations equal 7.2 % CPA–HV, 8.1 CPA–vdW1f 8.7 SRK–HV. No improvements found when solvation between was accounted regression pressures.
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