DYNAMIC GAS-TRANSPORT IN POROUS BIDISPERSED ALUMINA

Citation
V. Hejtmanek et al., DYNAMIC GAS-TRANSPORT IN POROUS BIDISPERSED ALUMINA, Collection of Czechoslovak Chemical Communications, 63(11), 1998, pp. 1954-1962
Citations number
9
Categorie Soggetti
Chemistry
ISSN journal
00100765
Volume
63
Issue
11
Year of publication
1998
Pages
1954 - 1962
Database
ISI
SICI code
0010-0765(1998)63:11<1954:DGIPBA>2.0.ZU;2-G
Abstract
A spontaneous temporary rise in the pressure gradient through counterc urrent binary transport of inert gases in porous bidispersed alumina w as observed in diffusion cell of the Wicke-Kallenbach type. Experiment al pressure responses to gas step changes were detected and fitted to a set of partial differential equations. These were based on the trans port models Mean Transport Pore Model (MTPM) and Dusty Gas Model (DGM) . The dynamic set transport parameters [r], [r(2)] and psi for both mo dels were obtained using an optimization algorithm and discussed. It w as found that the values of the transport radius [r] are in a good agr eement with the mean radius obtained from the measurement of alumina t exture.