Study on enhanced absorption of carbon dioxide by porous liquid in mine water

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL Chemical Engineering Science Pub Date : 2025-04-06 DOI:10.1016/j.ces.2025.121632

Xinrui Zhou , Linkun Ji , Kefeng Liu , Fei Gao , Zhongqi Ren , Zhiyong Zhou

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Abstract

In order to realize the resource utilization of mine water, amino functionalized ionic liquid diethylenetriamine imidazole ([DETA][Im]) and modified ZIF-8 were synthesized to prepare porous liquid [DETA][Im]–(mPEG)ZIF-8, which was used to form a solution with mine water to enhance the CO₂ absorption capacity of mine water. The metal–organic framework (MOF) materials and porous liquids were characterized by Fourier-transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD) spectroscopy and Brunner–Emmet–Teller (BET) measurements. The saturated CO₂ absorption capacity of the porous liquid reached up to 4.5 mol/kg, and the addition of just 20 % of the porous liquid could increase the CO₂ absorption capacity of mine water by 53 times. The reaction between [DETA][Im] in porous liquid and CO₂ followed the “zwitterion” mechanism. After forming a porous mixed solution by adding [DETA][Im]–(mPEG)ZIF-8 in mine water, the final absorption product was bicarbonate.

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矿井水中多孔液体增强二氧化碳吸附的研究

为实现矿用水的资源利用，合成氨基功能化离子液体二乙三胺咪唑（[DETA][Im]）和改性ZIF-8，制备多孔液体[DETA][Im] - (mPEG)ZIF-8，与矿用水形成溶液，增强矿用水对CO2的吸收能力。采用傅里叶变换红外（FT-IR）光谱、热重分析（TGA）、x射线衍射（XRD）光谱和Brunner-Emmet-Teller （BET）测量对金属有机骨架（MOF）材料和多孔液体进行了表征。多孔液体的饱和CO2吸收量可达4.5 mol/kg，仅添加20% %的多孔液体即可使矿井水的CO2吸收量提高53倍。多孔液体中[DETA][Im]与CO2的反应遵循“两性离子”机制。在矿井水中加入[DETA][Im] - (mPEG)ZIF-8形成多孔混合溶液后，最终吸附产物为碳酸氢盐。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.