UNIFAC model for ionic liquid‐CO2 systems. Issue 2 (26th November 2013)

• Record Type: Journal Article
• Authors: Lei, Zhigang; Dai, Chengna; Wang, Wei; Chen, Biaohua
• Is Part Of: AIChE journal. Volume 60:Issue 2(2014:Feb.)
• Page Start: 716
• Page End: 729
• Publication Date: 2013-11-26
• Subjects: Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.14294
• Languages: English
• ISSNs: 0001-1541

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The new group binary interaction parameters of UNIFAC model (<italic>a</italic>_nm and <italic>a</italic>_mn) between CO₂ and 22 ionic liquid (IL) groups were obtained by means of correlating the solubility data of CO₂ in pure ILs at different temperatures (&gt;273.2 K). We measured the CO₂ solubility at low temperatures down to 243.2 K in pure ILs, i.e., [OMIM]⁺[BF₄]⁻ and [OMIM]⁺[Tf₂N]⁻, and their equimolar amount of mixture, in order to fill the blank of solubility data at low temperatures and also to justify the applicability of UNIFAC model over a wider temperature range. It was verified that UNIFAC model can be used for predicting the CO₂ solubility in pure ILs and in the binary mixture of ILs both at high (&gt;273.2 K) and low temperatures (&lt;273.2 K) effectively, as well as identifying the new structure–property relation. This is the first work to extend the UNIFAC model to IL‐CO₂ systems. © 2013 American Institute of Chemical Engineers <italic>AIChE J</italic> 60: 716–729, 2014</p> </abstract>