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Solubility of greenhouse and acid gases on the [C4mim][MeSO4] ionic liquid for gas separation and CO2 conversion

Paper ID Volume ID Publish Year Pages File Format Full-Text
53772 46983 2015 10 PDF Available
Title
Solubility of greenhouse and acid gases on the [C4mim][MeSO4] ionic liquid for gas separation and CO2 conversion
Abstract

•CO2 capture from effluent industrial gases is addressed for future CO2 conversion.•Gas separation using [C4mim][MeSO4] is described with the soft-SAFT equation of state.•The solubility of several gases in the IL is given using a minimum amount of data.•The phase behavior of ternary mixtures IL/CO2/acid gas is predicted.•High selectivity values are achieved, showing good capacity of the IL as a solvent.

Ionic liquids (ILs) are an exciting class of compounds of high interest from a technological point of view. One of the applications that is raising more interest is their possible use as solvents to carry out the conversion of CO2 into more valuable compounds. Theoretical approaches provide an attractive option to screen ILs properties and give quick answers to guide the experiments, becoming a crucial tool for process design. This work illustrates a practical example based on the solubility of greenhouse and acid gases on the butylmethylimidazolium methylsulfate [C4mim][MeSO4] IL, in order to study its feasibility for gas separation and conversion. A simple but reliable molecular model is presented for the ionic liquid based on structural information and molecular simulations, and coarse-grained models are used to model the different gases. The absorption of relevant gases for the separation/conversion process (CO2, CH4, CO, H2, SO2, H2S) in [C4mim][MeSO4] is modeled and compared with experimental data using a minimum amount of binary data. From this information, the ternary diagrams of [C4mim][MeSO4] with CO2 and the acid gases SO2 and H2S are predicted, and the selectivity of CO2 by respect all the gases is evaluated, with particular attention to the contaminants above mentioned.

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Keywords
Ionic liquids; Gas separation; CO2 conversion; Soft-SAFT; Selectivity
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Solubility of greenhouse and acid gases on the [C4mim][MeSO4] ionic liquid for gas separation and CO2 conversion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 255, 15 October 2015, Pages 87–96
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us