CO2capture enhancement by encapsulation of nanoparticles in metal-organic frameworks suspended in physical absorbents

Ronghuan Xu, Hyungseop Ahn, Seonggon Kim, Jae Won Lee, Yong Tae Kang

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

In this study, CO2 nanoabsorbents composed of encapsulated Fe3O4 nanoparticles in metal-organic frameworks (MOFs) and methanol, are developed to overcome the limitations of conventional CO2 sorbents. The polyvinylpyrrolidone-functionalized Fe3O4 nanoparticles encapsulated in (Zn)MOF-74 [Zn2(DOBDC), DOBDC = 2, 5-dihydroxyterephthalic acid] are dispersed in the methanol. Compared with pure methanol, CO2 absorption and regeneration performances of Fe3O4 @ (Zn)MOF-74/methanol are improved by 13.07% and 16.25% (Abs.: 0.84 g-CO2/L-solvent and reg.: 0.77 g-CO2/L-solvent), respectively, at optimum conditions of 0.01 wt%. Cyclic stability experiments exhibit that the performance of Fe3O4 @ (Zn)MOF-74/methanol can preserve 93.76% of their initial capacities. It is finally concluded that the absorption performance is improved by hydrodynamic and shuttle effects while the CO2 sorbent regeneration performance is enhanced by metal-organic heat carriers (MOHCs) and nucleation from the surface of nanoparticles by introducing Fe3O4 @ (Zn)MOF-74 nanoparticles.

Original languageEnglish
Article number102397
JournalJournal of CO2 Utilization
Volume69
DOIs
Publication statusPublished - 2023 Mar

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea ( NRF ) grant funded by the Korea government ( MSIP ) (Grant number: 2022R1A2B5B03002421 and 2020R1A5A1018153 ).

Publisher Copyright:
© 2023 The Authors.

Keywords

  • COabsorption
  • COregeneration
  • Encapsulation
  • Functionalized FOnanoparticles
  • Metal-organic frameworks

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Process Chemistry and Technology

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