Selection of Ionic Liquids for the Design of Separation Processes of CO₂ + H₂S Mixed Waste Gases with Different Compositions

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nThis is an unedited manuscript accepted for publication and provided as an Article in Press for early access at the author’s request. The article will undergo copyediting, typesetting, and galley proof review before final publication. Please be aware that errors may be identified during production that could affect the content. All legal disclaimers of the journal apply.n

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Year : 2025 [if 2224 equals=””]13/09/2025 at 12:29 PM[/if 2224] | [if 1553 equals=””] Volume : 14 [else] Volume : 14[/if 1553] | [if 424 equals=”Regular Issue”]Issue : [/if 424][if 424 equals=”Special Issue”]Special Issue[/if 424] [if 424 equals=”Conference”][/if 424] 03 | Page :

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    Wi Song Kim, Kwang Guk Kim, Chol Ryong Choe, Tang Hyon Yun, Jong Hyok Kim,

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  1. Student, Associate Professor, Professor, Associate Professor, Professor, Institution of Chemical Engineering, Kim Chaek University of Technology, Institution of Chemical Engineering, Kim Chaek University of Technology, Institution of Chemical Engineering, Kim Chaek University of Technology, Institution of Chemical Engineering, Kim Chaek University of Technology, Institution of Chemical Engineering, Kim Chaek University of Technology, ,

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Abstract

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nThe waste gas from chemical plants contains H 2 S gas and a large amount of CO 2 gas. These flue gases can be treated in various ways, and in this paper, the mixed flue gas CO 2 +H 2 S was treated by using ionic liquids (IL) as an absorbent. Ionic liquids are considered green solvents with remarkable good properties. In particular, it is known as a very effective solvent for the absorption and separation of various gases. This has led to the use of ionic liquids for the absorption of off-gas, but most of them are limited to the treatment of individual gases with a particular composition. In this paper, thermodynamic analysis and process simulation have been carried out to select a suitable ionic liquid for the absorption of CO 2 and H 2 S gas in a flue gas feed stream with a wide composition range. The results showed that [Omim][NTf 2 ] (1-octyl-3-methyl imidazolium bis trifluoro methyl sulfonyl imide) is the most suitable ionic liquid because of the low consumption of the absorber and the low energy consumption of the process compared to other ionic liquids. The selected ionic liquids had a lower energy consumption and consumption under all conditions regardless of the composition of CO 2 and H 2 S compared to the conventional absorption process using MEA (mono ethanol amine). The absorption solvent presented in this paper is a green hybrid solvent that is very effective for the absorption of CO 2 and H 2 S mixtures, and is also widely available in the processing industry of coal and natural gas.nn

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Keywords: Ionic liquids, absorption, exhaust gases, and process simulation

n[if 424 equals=”Regular Issue”][This article belongs to Journal of Catalyst & Catalysis ]

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How to cite this article:
nWi Song Kim, Kwang Guk Kim, Chol Ryong Choe, Tang Hyon Yun, Jong Hyok Kim. [if 2584 equals=”][226 wpautop=0 striphtml=1][else]Selection of Ionic Liquids for the Design of Separation Processes of CO₂ + H₂S Mixed Waste Gases with Different Compositions[/if 2584]. Journal of Catalyst & Catalysis. 13/09/2025; 14(03):-.

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How to cite this URL:
nWi Song Kim, Kwang Guk Kim, Chol Ryong Choe, Tang Hyon Yun, Jong Hyok Kim. [if 2584 equals=”][226 striphtml=1][else]Selection of Ionic Liquids for the Design of Separation Processes of CO₂ + H₂S Mixed Waste Gases with Different Compositions[/if 2584]. Journal of Catalyst & Catalysis. 13/09/2025; 14(03):-. Available from: https://journals.stmjournals.com/jocc/article=13/09/2025/view=0

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Volume 14
[if 424 equals=”Regular Issue”]Issue[/if 424][if 424 equals=”Special Issue”]Special Issue[/if 424] [if 424 equals=”Conference”][/if 424] 03
Received 11/08/2025
Accepted 09/09/2025
Published 13/09/2025
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Publication Time 33 Days

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