Dynamic gas transport in porous bidispersed alumina

被引:0
|
作者
Hejtmanek, V [1 ]
Capek, P [1 ]
Solcova, O [1 ]
Schneider, P [1 ]
机构
[1] Acad Sci Czech Republ, Inst Chem Proc Fundamentals, CR-16502 Prague 6, Czech Republic
关键词
diffusion; gas permeation; porous structure model; alumina; porous materials;
D O I
10.1135/cccc19981954
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A spontaneous temporary rise in the pressure gradient through countercurrent binary transport of inert gases in porous bidispersed alumina was observed in diffusion cell of the Wicke-Kallenbach type. Experimental pressure responses to gas step changes were detected and fitted to a set of partial differential equations. These were based on the transport models Mean Transport Pore Model (MTPM) and Dusty Gas Model (DGM). The dynamic set transport parameters [r], [r(2)] and psi for both models were obtained using an optimization algorithm and discussed. It was found that the values of the transport radius [r] are in a good agreement with the mean radius obtained from the measurement of alumina texture.
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页码:1954 / 1962
页数:9
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