4.6 Article

State of the art of ionic liquid-modified adsorbents for CO2 capture and separation

Journal

AICHE JOURNAL
Volume 68, Issue 2, Pages -

Publisher

WILEY
DOI: 10.1002/aic.17500

Keywords

adsorption; CO2 capture; ionic liquids; porous materials; separation

Funding

  1. National Key R&D Program of China [2020YFA0710200]
  2. Major Program of National Natural Science Foundation of China [21890764]
  3. Key Program of National Natural Science Foundation of China [21838010]
  4. National Natural Science Foundation of China [22122814]
  5. Hebei Natural Science Foundation [B2019103011]
  6. Youth Innovation Promotion Association of the Chinese Academy of Sciences [2018064]
  7. Innovation Academy for Green Manufacture [IAGM2020C14]

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The use of IL-modified adsorbents for CO2 capture shows promising application prospects due to the advantages of both ILs and porous supports, resulting in improved CO2 selectivity and specific surface area.
The enormous emission of carbon dioxide (CO2) from industries has triggered a series of environmental issues. In recent years, ionic liquids (ILs) as novel absorbents are widely used for CO2 capture owing to their low vapor pressure and tunable structures. IL-modified adsorbents have the advantages of both ILs and porous supports, such as high CO2 selectivity and high specific surface area, which are novel agents to capture CO2 with broad application prospects. In this review, more than 140 IL-modified adsorbents for CO2 capture in recent years were systematically summarized. The types of ILs including conventional ILs and functionalized ILs on CO2 separation performance of different IL hybrid adsorbents, and their adsorption mechanisms were also discussed. Finally, future perspectives on IL-modified adsorbents for CO2 separation were further posed.

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