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Measurement of ass transfer rates in adsorbents / Timothy J. Giesy in Industrial & engineering chemistry research, Vol. 51 N° 35 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11509–11517 Titre : Measurement of ass transfer rates in adsorbents : New combined - technique frequency response apparatus and application to CO2 in 13X zeolite Type de document : texte imprimé Auteurs : Timothy J. Giesy, Auteur ; Yu Wang, Auteur ; M. Douglas LeVan, Auteur Année de publication : 2012 Article en page(s) : pp. 11509–11517 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Mass  transfer  Adsorbents Résumé : A new combined-technique frequency response apparatus has been developed for studying mass transfer in porous adsorbents. This new apparatus can perform pressure-swing, volume-swing, and concentration-swing frequency response experiments, enabling it to investigate mass transfer of pure components and binary gas mixtures in adsorbents over a wide frequency range. To demonstrate the capabilities of the apparatus, pressure-swing and volume-swing frequency response experiments were performed in tandem to study transport of pure CO2 in 13X zeolite beads over the frequency range from 10–4 Hz to 10 Hz at pressures from 0.125 to 1 bar. Frequency response spectra show that transport in this system is governed by a nonisothermal macropore diffusion resistance with diffusion occurring by a Knudsen-type mechanism. Macropore diffusion control is confirmed by the existence of particle size dependence of the system’s dynamic response. In smaller zeolite particles, the macropore diffusion resistance is lower, and macropore diffusion becomes less important to the system response. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014204 [article] Measurement of ass transfer rates in adsorbents : New combined - technique frequency response apparatus and application to CO2 in 13X zeolite [texte imprimé] / Timothy J. Giesy, Auteur ; Yu Wang, Auteur ; M. Douglas LeVan, Auteur . - 2012 . - pp. 11509–11517. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11509–11517 Mots-clés : Mass  transfer  Adsorbents Résumé : A new combined-technique frequency response apparatus has been developed for studying mass transfer in porous adsorbents. This new apparatus can perform pressure-swing, volume-swing, and concentration-swing frequency response experiments, enabling it to investigate mass transfer of pure components and binary gas mixtures in adsorbents over a wide frequency range. To demonstrate the capabilities of the apparatus, pressure-swing and volume-swing frequency response experiments were performed in tandem to study transport of pure CO2 in 13X zeolite beads over the frequency range from 10–4 Hz to 10 Hz at pressures from 0.125 to 1 bar. Frequency response spectra show that transport in this system is governed by a nonisothermal macropore diffusion resistance with diffusion occurring by a Knudsen-type mechanism. Macropore diffusion control is confirmed by the existence of particle size dependence of the system’s dynamic response. In smaller zeolite particles, the macropore diffusion resistance is lower, and macropore diffusion becomes less important to the system response. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014204