V. Hejtmanek et al., DYNAMIC GAS-TRANSPORT IN POROUS BIDISPERSED ALUMINA, Collection of Czechoslovak Chemical Communications, 63(11), 1998, pp. 1954-1962
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.