Adsorption Science & Technology (Feb 2015)

CO Adsorption on Ionic Liquid—Modified Cu-BTC: Experimental and Simulation Study

  • F.W.M. da Silva,
  • G.M. Magalhães,
  • E.O. Jardim,
  • J. Silvestre-Albero,
  • A. Sepúlveda-Escribano,
  • D.C.S. de Azevedo,
  • S.M.P. de Lucena

DOI
https://doi.org/10.1260/0263-6174.33.2.223
Journal volume & issue
Vol. 33

Abstract

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We analyzed the adsorption of CO 2 in a Cu-BTC metal-organic framework (MOF) impregnated with ionic liquids (ILs) experimentally and by molecular simulation using the Monte Carlo method. The ILs [bmim][PF 6 ] and [bmim][Tf 2 N] were impregnated in concentrations of 1, 5 and 10 wt%. Monte Carlo computations showed maximum impregnation load of approximately 30 wt% and improved CO 2 adsorption up to 2 bar for all the concentrations tested. Experimentally, the impregnated material was carefully characterized and CO 2 isotherms were measured. High concentrations of IL solution (10 wt%) had a pronounced detrimental effect on the textural properties of Cu-BTC, whereas for low concentration (5 wt%), no improvement in CO 2 adsorption was observed. Based on the experimental and simulated data, the suitability of Cu-BTC as a target MOF for IL impregnation was examined.