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CO2/H2O Adsorption Equilibrium and Rates on Metal−Organic Frameworks: HKUST-1 and Ni/DOBDC

Liu, Jian, Wang, Yu, Benin, Annabelle I., Jakubczak, Paulina, Willis, Richard R., LeVan, M. Douglas·2010·Langmuir

Abstract

Metal-organic frameworks (MOFs) have recently attracted intense research interest because of their permanent porous structures, huge surface areas, and potential applications as novel adsorbents and catalysts. In order to provide a basis for consideration of MOFs for removal of carbon dioxide from gases containing water vapor, such as flue gas, we have studied adsorption equilibrium of CO(2), H(2)O vapor, and their mixtures and also rates of CO(2) adsorption in two MOFs: HKUST-1 (CuBTC) and Ni/DOBDC (CPO-27-Ni or Ni/MOF-74). The MOFs were synthesized via solvothermal methods, and the as-synthesized products were solvent exchanged and regenerated before experiments. Pure component adsorption equilibria and CO(2)/H(2)O binary adsorption equilibria were studied using a volumetric system. The effects of H(2)O adsorption on CO(2) adsorption for both MOF samples were determined, and the results for 5A and NaX zeolites were included for comparison. The hydrothermal stabilities for the two MOFs over the course of repetitive measurements of H(2)O and CO(2)/H(2)O mixture equilibria were also studied. CO(2) adsorption rates from helium for the MOF samples were investigated by using a unique concentration-swing frequency response (CSFR) system. Mass transfer into the MOFs is rapid with the controlling resistance found to be macropore diffusion, and rate parameters were established for the mechanism.

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Metadata

Authors
Liu, J., Wang, Y., Benin, A. I., Jakubczak, P., Willis, R. R., & LeVan, M. D.
Venue
Langmuir
Published
2010-08-13
Volume
26
Issue
17
Pages
14301-14307
ISSN
  • 0743-7463 (ISSN-L)
  • 1520-5827
OpenAlex
W2084977165
Cited by
444
References
41
FWCI
14.37
Type
journal article
Language
en
Open access
closed

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