In this work, CO2 adsorption on a laboratory-synthesized polymeric copper(II) benzene-1,3,5-tricarboxylate(Cu-BTC) metal-organic framework was modeled by means of the semiempirical Sips equation in order toobtain parameters of engineering interest. Produced Cu-BTC samples were characterized by X-ray diffraction,thermogravimetry, and microporosimetric analysis; high crystallinity and very high specific surface areaand pore volume were found. CO2 adsorption isotherms on Cu-BTC were evaluated at T ) (283, 293, 318,and 343) K for p e 1 bar by means of a volumetric technique. In order to establish a comparison, CO2adsorption isotherms on samples of commercial 13X zeolite were determined under the same experimentalconditions and then modeled in the same way as those for Cu-BTC. The modeling and experimental resultsindicated that relative to 13X zeolite, Cu-BTC showed higher CO2 adsorption capacities at near-ambienttemperature and a lower heat release during the adsorption phase.
Modeling Carbon Dioxide Adsorption on Microporous Substrates: Comparison between Cu-BTC Metal-Organic Framework and 13X Zeolitic Molecular Sieve
PEPE F.
2010-01-01
Abstract
In this work, CO2 adsorption on a laboratory-synthesized polymeric copper(II) benzene-1,3,5-tricarboxylate(Cu-BTC) metal-organic framework was modeled by means of the semiempirical Sips equation in order toobtain parameters of engineering interest. Produced Cu-BTC samples were characterized by X-ray diffraction,thermogravimetry, and microporosimetric analysis; high crystallinity and very high specific surface areaand pore volume were found. CO2 adsorption isotherms on Cu-BTC were evaluated at T ) (283, 293, 318,and 343) K for p e 1 bar by means of a volumetric technique. In order to establish a comparison, CO2adsorption isotherms on samples of commercial 13X zeolite were determined under the same experimentalconditions and then modeled in the same way as those for Cu-BTC. The modeling and experimental resultsindicated that relative to 13X zeolite, Cu-BTC showed higher CO2 adsorption capacities at near-ambienttemperature and a lower heat release during the adsorption phase.| File | Dimensione | Formato | |
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Aprea et al. (2010), J. Chem. Eng. Data 55, 3655–3661.pdf
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