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    李秀婷, 邵斌, 练昕宜, 韦凯媛, 李天阳子, 钟缪亦兰, 胡军, 王小永. 含乙醇胺三元低共熔溶剂吸收CO2的研究[J]. 华东理工大学学报(自然科学版). DOI: 10.14135/j.cnki.1006-3080.20230109001
    引用本文: 李秀婷, 邵斌, 练昕宜, 韦凯媛, 李天阳子, 钟缪亦兰, 胡军, 王小永. 含乙醇胺三元低共熔溶剂吸收CO2的研究[J]. 华东理工大学学报(自然科学版). DOI: 10.14135/j.cnki.1006-3080.20230109001
    LI Xiuting, SHAO Bin, LIAN Xinyi, WEI Kaiyuan, LI Tianyangzi, ZHONG Miuyilan, HU Jun, WANG Xiaoyong. CO2 Absorption by Ethanolamine-Based Ternary Deep Eutectic Solvents[J]. Journal of East China University of Science and Technology. DOI: 10.14135/j.cnki.1006-3080.20230109001
    Citation: LI Xiuting, SHAO Bin, LIAN Xinyi, WEI Kaiyuan, LI Tianyangzi, ZHONG Miuyilan, HU Jun, WANG Xiaoyong. CO2 Absorption by Ethanolamine-Based Ternary Deep Eutectic Solvents[J]. Journal of East China University of Science and Technology. DOI: 10.14135/j.cnki.1006-3080.20230109001

    含乙醇胺三元低共熔溶剂吸收CO2的研究

    CO2 Absorption by Ethanolamine-Based Ternary Deep Eutectic Solvents

    • 摘要: 以氯化胆碱(ChCl)、甘油(Gly)、乙醇胺(MEA)为原料,制备了ChCl-Gly-MEA三元低共熔溶剂(DES),研究了其在室温和常压下对CO2的吸收性能。在ChCl、Gly、MEA具有不同物质的量之比(1∶1∶4、1∶1∶6、1∶1∶8、1∶1∶10)的4种样品中,当ChCl、Gly、MEA物质的量之比为1∶1∶10时,CO2的吸收量最大,每克DES中CO2的吸收量为0.18 g。CO2流速越高、含水量越低,则ChCl-Gly-MEA三元DES对CO2的吸收量越大。ChCl-Gly-MEA三元DES对CO2的吸收机理同时存在物理吸收和化学吸收,MEA的加入会显著提高其化学吸收作用。经5次吸收-解吸-再吸收后,ChCl-Gly-MEA三元 DES仍保持97.3%的再生效率,说明ChCl-Gly-MEA三元DES具有良好的再生性。

       

      Abstract: Ternary deep eutectic solvents (DES) comprising choline chloride (ChCl), glycerol (Gly) and ethanolamine (MEA) with different molar ratios were prepared. The CO2 absorption ability of the ternary DES was investigated at room temperature and under atmospheric pressure. Among four ternary DES samples prepared with different molar ratios, a ChCl-Gly-MEA (1:1:10) ternary DES was found to absorb the most CO2 at a capacity of 0.18 g CO2/g (DES per gram) at 298 K and 101.3 kPa. The experimental results showed that the CO2 absorption capacity of ChCl-Gly-MEA (1:1:10) ternary DES increased with an increase in gas flow rate and a decrease in water content. The gas flow rate improved the mass transfer efficiency of CO2 in the ternary DES system, and shortened the time required for CO2 absorption to reach equilibrium. However, the addition of water could weaken the hydrogen bonding interaction among the three components in the DES system. Results from Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy indicated that CO2 interacted with the amino groups in DES to form carbamates. The absorption of CO2 by ChCl-Gly-MEA underwent both physical and chemical absorption, and the chemical absorption was significantly enhanced by the addition of MEA. A recovery experiment showed that no obvious loss in CO2 absorption was detected after five absorption/desorption cycles with an absorption rate of 97.3% being retained.

       

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