用于常压下二氧化碳捕集的功能化离子液体
Functionalized Ionic Liquids for CO Capture under Ambient Pressure.
作者信息
Zhao Hua, Baker Gary A
机构信息
Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA.
Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
出版信息
Green Chem Lett Rev. 2023;16(1). doi: 10.1080/17518253.2022.2149280. Epub 2022 Dec 22.
Ionic liquids (ILs) have been widely explored as alternative solvents for carbon dioxide (CO) capture and utilization. However, most of these processes are under pressures significantly higher than atmospheric level, which not only levies additional equipment and operation costs, but also makes the large-scale CO capture and conversion less practical. In this study, we rationally designed glycol ether-functionalized imidazolium, phosphonium and ammonium ILs containing acetate (OAc) or TfN anions, and found these task-specific ILs could solubilize up to 0.55 mol CO per mole of IL (or 5.9 wt% CO) at room temperature and atmospheric pressure. Although acetate anions enabled a better capture of CO, TfN anions are more compatible with alcohol dehydrogenase (ADH), which is a key enzyme involved in the cascade enzymatic conversion of CO to methanol. Our promising results indicate the possibility of CO capture under ambient pressure and its enzymatic conversion to valuable commodity.
离子液体（ILs）已被广泛研究作为二氧化碳（CO₂）捕获和利用的替代溶剂。然而，这些过程大多是在远高于大气压力的条件下进行，这不仅增加了额外的设备和运营成本，也使得大规模的CO₂捕获和转化不太可行。在本研究中，我们合理设计了含有乙酸根（OAc）或双（三氟甲基磺酰）亚胺（TfN）阴离子的乙二醇醚官能化咪唑鎓、鏻和铵离子液体，发现这些特定任务型离子液体在室温和大气压下每摩尔离子液体可溶解高达0.55摩尔CO₂（或5.9 wt% CO₂）。虽然乙酸根阴离子能更好地捕获CO₂，但TfN阴离子与乙醇脱氢酶（ADH）更兼容，乙醇脱氢酶是CO₂级联酶促转化为甲醇过程中的关键酶。我们的研究结果表明在常压下捕获CO₂并将其酶促转化为有价值化学品的可能性。
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