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Functionalized Ionic Liquids for CO₂ Capture under Ambient Pressure.

ABSTRACT: Ionic liquids (ILs) have been widely explored as alternative solvents for carbon dioxide (CO₂) 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 CO₂ capture and conversion less practical. In this study, we rationally designed glycol ether-functionalized imidazolium, phosphonium and ammonium ILs containing acetate (OAc^-) or Tf₂N^- anions, and found these task-specific ILs could solubilize up to 0.55 mol CO₂ per mole of IL (or 5.9 wt% CO₂) at room temperature and atmospheric pressure. Although acetate anions enabled a better capture of CO₂, Tf₂N^- anions are more compatible with alcohol dehydrogenase (ADH), which is a key enzyme involved in the cascade enzymatic conversion of CO₂ to methanol. Our promising results indicate the possibility of CO₂ capture under ambient pressure and its enzymatic conversion to valuable commodity.

SUBMITTER: Zhao H

PROVIDER: S-EPMC10254919 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature

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Functionalized Ionic Liquids for CO2 Capture under Ambient Pressure.

Zhao Hua H Baker Gary A GA

Green chemistry letters and reviews 20221222 1

Ionic liquids (ILs) have been widely explored as alternative solvents for carbon dioxide (CO2) 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 CO2 capture and conversion less practical. In this study, we rationally designed glycol ether-functionalized imidazolium, phosphonium and ammonium ILs containing ace ...[more]

PMID: 37304337

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