MATHEMATICAL MODEL OF MASS TRANSFER
IN THE CASE OF A BIDISPERSED POROUS MATERIAL

A. I. Moshinskii

UDC 539.217.2:66.084

Consideration is given to a model (suitable for description 
at large times) for analysis of the heat- and mass-exchange processes 
of a porous body with two types of pores. Specifically, we are dealing 
with impregnation (in a sense, with the process of extraction, its 
converse). The solution of the problem with the most typical supplementary 
conditions is obtained; the kinetic impregnation (withdrawal) function 
and the density of the substance flux from the body are found for 
this problem.

Keywords: two-component nature, mass exchange, porous 
body, impregnation, extraction.
 
St. Petersburg Academy of Chemistry and Pharmaceutics, 14 
Prof. Popov Str., St. Petersburg, 193376, Russia. Translated from 
Inzhenerno-Fizicheskii Zhurnal, Vol. 82, No. 2, pp. 258-272, March-April, 
2009. Original article submitted December 4, 2007; revision submitted 
July 14, 2008.