Fatma R. Al-Fazari, Farouq S. Mjalli, Mehdi Shakourian-Fard, Ganesh Kamath, Jamil Naser, Ghulam Murshid, Suhaib Al Ma'awali
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Abstract
Carbon dioxide capture technology, while established, faces operational and economic challenges with current absorbents. Ionic liquids (ILs), though promising for their selectivity and low volatility, often have drawbacks like high toxicity and viscosity. This study explores nonionic low transition temperature mixtures (LTTMs) of menthol (MET) and polyethylene glycol 200 (PEG200) at various ratios for CO2 uptake. The 1:2 molar ratio showed maximum CO2 loading of 0.599 mol CO2 /mol solvent at 303.15 K and 1000 kPa, with water addition boosting CO2 uptake by 25%. This rise in uptake with water could be due to altered hydrogen bonding within the mixture constituents. Molecular dynamics simulations support these findings, indicating experimental results, showing that water disrupts hydrogen bonds, exposing hydroxyl and ether sites for CO2 interaction. This LTTM solvent system presents a promising, low-toxicity alternative for efficient CO2 capture. © 2025 Society of Chemical Industry and John Wiley & Sons, Ltd.
薄荷醇-聚乙二醇 LTTM 在二氧化碳捕获中的评估和性能
二氧化碳捕获技术虽然已经建立，但目前的吸收剂面临着操作和经济方面的挑战。离子液体虽然具有选择性和低挥发性等优点，但也存在高毒性和高粘度等缺点。本研究探讨了不同比例的薄荷醇（MET）和聚乙二醇200 （PEG200）的非离子低温混合物（LTTMs）对二氧化碳的吸收。在303.15 K和1000 kPa条件下，1:2摩尔比下CO2的最大负荷为0.599 mol CO2/mol溶剂，加水可使CO2吸收量提高25%。这种随水吸收的增加可能是由于混合物成分中氢键的改变。分子动力学模拟支持这些发现，表明实验结果表明，水破坏氢键，暴露羟基和乙醚位点的二氧化碳相互作用。这种LTTM溶剂系统提供了一种有前途的、低毒性的高效二氧化碳捕获替代方案。©2025化学工业协会和John Wiley &；儿子,有限公司
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