Influence of ionic liquid on polar organic compounds solubility in dense CO2 phase

Abstract

Accurate measurement and prediction of the phase behaviour of mixtures involved in a chemical process are crucial for its optimisation. Given the importance of CO2 conversion technologies and considering possible benefits of CO2-ionic liquid biphasic systems, i.e., facilitating a product separation, we investigated the high-pressure behaviour of components of interest in a recently developed process of cyclic carbonate synthesis directly from CO2 and potentially bio-based alcohols. The solubility of 1,2-butanediol and 1,2-butylene carbonate in a dense carbon dioxide phase was determined experimentally at the temperature of 313.2 K and pressures between 6 and 18 MPa. The influence of 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ionic liquid, [hmim][FAP], as a solvent, on the solubility of these compounds in CO2-rich phase, in ternary (CO2 + 1,2-butanediol + [hmim][FAP]), CO2 + butylene carbonate + [hmim][FAP]) and quaternary (CO2 + 1,2-butanediol + butylene carbonate + [hmim][FAP]) mixtures was investigated. The experimental results of the two binary systems were correlated using the density-based Chrastil equation. The knowledge of phase equilibria behaviours reported in this work will be useful for designing chemical conversions of carbon dioxide using [hmim][FAP] ionic liquid as reaction solvents.

Publication DOI: https://doi.org/10.1016/j.supflu.2023.106089
Divisions: College of Engineering & Physical Sciences
Aston University (General)
Funding Information: This work was supported by Fundação para a Ciência e Tecnologia FCT/MCTES projects PTDC/EQU-EPQ/31926/2017 , UIDB/50006/2020 , and MIT-EXPL/CS/0052/2021 of the Associate Laboratory for Green Chemistry – LAQV , and UIDB/00100/2020 of the Centro de Química
Additional Information: Copyright © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/). Funding Information: This work was supported by Fundação para a Ciência e Tecnologia FCT/MCTES projects PTDC/EQU-EPQ/31926/2017 , UIDB/50006/2020 , and MIT-EXPL/CS/0052/2021 of the Associate Laboratory for Green Chemistry – LAQV , and UIDB/00100/2020 of the Centro de Química Estrutural – CQE . GC-FID data were obtained by the Analysis Laboratory LAQV/Requimte - Chemistry Department, FCT NOVA - Portugal.
Uncontrolled Keywords: Butanediol,Cyclic carbonate,High-pressure carbon dioxide,Multicomponent systems,Phase behaviour,Tris(pentafluoroethyl)trifluorophosphate ionic liquid,General Chemical Engineering,Condensed Matter Physics,Physical and Theoretical Chemistry
Publication ISSN: 0896-8446
Last Modified: 02 Dec 2024 09:01
Date Deposited: 20 Nov 2023 11:13
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 89684462300253X (Publisher URL)
PURE Output Type: Article
Published Date: 2023-12-01
Published Online Date: 2023-10-13
Accepted Date: 2023-10-12
Authors: Zakrzewska, Małgorzata Ewa
Borovkov, Yegor
Paninho, Ana Brandão
Petrovski, Zeljko
Najdanovic-Visak, Vesna (ORCID Profile 0000-0002-1035-0982)
Nunes, Ana Vital Morgado

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