Supramolecular Complexation-Enhanced CO2 Chemisorption in Amine-Derived Sorbents

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Abstract

A supramolecular complexation approach is developed to improve the CO2 chemisorption performance of solvent-lean amine sorbents. Operando spectroscopy techniques reveal the formation of carbamic acid in the presence of a crown ether. The reaction pathway is confirmed by theoretical simulation, in which the crown ether acts as a proton acceptor and shuttle to drive the formation and stabilization of carbamic acid. Improved CO2 capacity and diminished energy consumption in sorbent regeneration are achieved.

Original languageEnglish
Article numbere202402137
JournalChemistry - A European Journal
Volume30
Issue number48
DOIs
StatePublished - Aug 27 2024

Funding

The research was supported financially by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy.

Keywords

  • Amine sorbents
  • CO Chemisorption
  • Carbamic acid
  • Intermolecular proton transfer
  • Supramolecular complexation

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