Modelling carbon dioxide solubility in ionic liquids. (30th April 2012)

• Record Type: Journal Article
• Authors: Mortazavi‐Manesh, Soheil; Satyro, Marco; Marriott, Robert A.
• Is Part Of: Canadian journal of chemical engineering. Volume 91:Number 4(2013)
• Page Start: 783
• Page End: 789
• Publication Date: 2012-04-30
• Subjects: Chemical engineering -- Periodicals; Technology -- Periodicals; 660.05
• DOI: 10.1002/cjce.21687
• Languages: English
• ISSNs: 0008-4034

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Solubility information for CO₂ in different ionic liquids, ILs, in part can potentially be used to select a specific IL for the separation of CO₂ from hydrocarbon fluids. Unfortunately, not all CO₂–IL systems have been experimentally described at similar temperatures and pressures; therefore, a direct comparison of performance by process simulation is not always possible. In the extreme cases, the design of a CO₂ separation process may require predicting the CO₂–IL equilibria for which there are no available solubility data. To address the need for this information, a semi‐empirical correlation was developed to estimate the dissolution of CO₂ in CO₂–IL solvent systems. The theoretical COSMO–RS calculation method was used to calculate the chemical potential of CO₂ in a wide variety of ILs and the Soave–Redlich–Kwong equation was used to calculate the fugacity coefficient of the CO₂ vapour phase. The model was correlated with available literature data, yielding an average error of AAR = 23% and small bias. © 2012 Canadian Society for Chemical Engineering</p> </abstract>