Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1021/ja109235c
Titel (primär) Guest diffusion in interpenetrating networks of micro- and mesopores
Autor Furtado, F.; Galvosas, P.; Gonçalves, M.; Kopinke, F.-D.; Naumov, S.; Rodríguez-Reinoso, F.; Roland, U.; Valiullin, R.; Kärger, J.
Journal / Serie Journal of the American Chemical Society
Erscheinungsjahr 2011
Department TUCHEM
Band/Volume 133
Heft 8
Seite von 2437
Seite bis 2443
Sprache englisch
Abstract Pulsed field gradient NMR is applied for monitoring the diffusion properties of guest molecules in hierarchical pore systems after pressure variation in the external atmosphere. Following previous studies with purely mesoporous solids, also in the material containing both micro- and mesopores (activated carbon MA2), the diffusivity of the guest molecules (cyclohexane) is found to be most decisively determined by the sample "history": at a given external pressure, diffusivities are always found to be larger if they are measured after pressure decrease (i.e., on the "desorption" branch) rather than after pressure increase (adsorption branch). Simple model consideration reproduces the order of magnitude of the measured diffusivities as well as the tendencies in their relation to each other and their concentration dependence.
dauerhafte UFZ-Verlinkung
Furtado, F., Galvosas, P., Gonçalves, M., Kopinke, F.-D., Naumov, S., Rodríguez-Reinoso, F., Roland, U., Valiullin, R., Kärger, J. (2011):
Guest diffusion in interpenetrating networks of micro- and mesopores
J. Am. Chem. Soc. 133 (8), 2437 - 2443