| Titre : | Composite catalytic-permselective membranes : a strategy for enhancing selectivity and permeation rates via reaction and diffusion (2011) |
| Auteurs : | Benjamin A. Wilhite, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 50 N° 17, Septembre 2011) |
| Article en page(s) : | pp. 10185-10193 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Diffusion Permeation Catalytic reaction Composite material |
| Résumé : | This manuscript presents a new strategy for enhancing permselective films via the addition of a porous, catalytically active layer in a composite catalytic-permselective membrane design. A general mathematical analysis of reaction and diffusion within the catalytic layer is presented in order to establish design criteria. Numerical simulations are presented for the case of the water-gas-shift reaction supporting hydrogen purification, to demonstrate the advantages of the composite catalytic-permselective design concept. For the case of a water-gas-shift catalytic coating placed atop a hydrogen-permselective dense palladium film, an 84% reduction in carbon monoxide (CO) exposure is predicted, along with a mild (8%) increase in the overall hydrogen permeation rate; this reduction in carbon monoxide contamination of the palladium surface represents a significant improvement in palladium film utilization. For the case of the same catalytic coating placed atop a carbon dioxide (CO2)-permselective polymer film, CO2-CO permselectivities are increased by two orders of magnitude. |
| DEWEY : | 660 |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=24483662 |
