The effect of ionic liquid [Bmim][BF4] on the kinetics of CO2 desorption in amine solutions

IF 4 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2025-02-11 DOI:10.1002/aic.18780

Rui-Qi Jia, Zhi-Yuan Xue, Shuang Liang, Guang-Wen Chu, Liang-Liang Zhang, Jian-Feng Chen

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Abstract

Here, the effect of ionic liquid (IL) on the kinetics of CO₂ desorption in amine solutions was investigated. N-(2-aminoethyl) ethanolamine (AEEA) and N,N-diethylethanolamine (DEEA) were used as representatives of primary/secondary and tertiary amines. Results indicated that IL had a promoting effect on AEEA, but not on DEEA. The initial desorption rate of AEEA can be improved by up to 36.4%. Kinetics for IL-activated AEEA was developed through a modified Arrhenius equation, and the activation energy was 38.48 kJ/mol, which was 10.7% lower than that of AEEA. The species distribution was monitored by ¹³C NMR, which showed that the IL was not directly involved in the reaction, but might activate desorption through hydrogen bonding. Furthermore, theoretical calculations revealed that the IL can form hydrogen bonding with carbamate during the desorption of primary/secondary amines to lower the energy barrier for the zwitterion formation reaction, while only weaker hydrogen bonding was formed during the desorption of tertiary amines.

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离子液体[Bmim][BF4]对胺溶液中CO2解吸动力学的影响

本文研究了离子液体（IL）对胺溶液中CO2解吸动力学的影响。以N-（2-氨基乙基）乙醇胺（AEEA）和N，N-二乙基乙醇胺（DEEA）作为一级/二级胺和叔胺的代表。结果表明，IL对AEEA有促进作用，对DEEA无促进作用。AEEA的初始解吸率可提高36.4%。利用改进的Arrhenius方程对il活化AEEA进行动力学分析，得到il活化AEEA的活化能为38.48 kJ/mol，比AEEA的活化能低10.7%。13C NMR对产物的形态分布进行了监测，表明IL不直接参与反应，但可能通过氢键激活脱附。此外，理论计算表明，IL在脱附伯胺/仲胺时可以与氨基甲酸酯形成氢键，降低两性离子形成反应的能垒，而在脱附叔胺时只形成较弱的氢键。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

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. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.