{"title":"CO2 absorption mechanism and kinetic modeling of mixed amines with ionic liquid activation","authors":"Rui-Qi Jia, Qing Wu, Liang-Liang Zhang, Bo Zhang, Guang-Wen Chu, Jian-Feng Chen","doi":"10.1002/aic.18493","DOIUrl":null,"url":null,"abstract":"<p>Ionic liquid (IL) can not only serve as solvents to reduce carbon capture energy consumption, but also may activate the CO<sub>2</sub> absorption of amine solutions. Here, the absorption mechanism and kinetic modeling of IL-activated single and mixed amines were studied in wetted wall column. N-(2-aminoethyl) ethanolamine (AEEA) and N,N-diethylethanolamine (DEEA) were used as representatives to evaluate the IL activation effects on primary and tertiary amines. It was found that IL activated the reaction process of primary amine, but had no activation effect on tertiary amine. The activation energy of AEEA-IL-CO<sub>2</sub> was 22.2 kJ/mol, which was 21.0% lower than AEEA-CO<sub>2</sub>. Kinetic modeling of IL-activated AEEA and mixed amines was established. Besides, the density functional theory calculations showed that IL can form hydrogen bonding and other interactions with AEEA and CO<sub>2</sub> to activate the absorption reaction, which can reduce 29.3% activation energy during the zwitterion formation stage.</p>","PeriodicalId":120,"journal":{"name":"AIChE Journal","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"AIChE Journal","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/aic.18493","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Ionic liquid (IL) can not only serve as solvents to reduce carbon capture energy consumption, but also may activate the CO2 absorption of amine solutions. Here, the absorption mechanism and kinetic modeling of IL-activated single and mixed amines were studied in wetted wall column. N-(2-aminoethyl) ethanolamine (AEEA) and N,N-diethylethanolamine (DEEA) were used as representatives to evaluate the IL activation effects on primary and tertiary amines. It was found that IL activated the reaction process of primary amine, but had no activation effect on tertiary amine. The activation energy of AEEA-IL-CO2 was 22.2 kJ/mol, which was 21.0% lower than AEEA-CO2. Kinetic modeling of IL-activated AEEA and mixed amines was established. Besides, the density functional theory calculations showed that IL can form hydrogen bonding and other interactions with AEEA and CO2 to activate the absorption reaction, which can reduce 29.3% activation energy during the zwitterion formation stage.
期刊介绍:
The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering.
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