Sakhmetova G., Brener A., Satayev M., Korabayeva K., 2016, On the Mesoscopic Model of Mass Transfer in Microporous Membranes, Chemical Engineering Transactions, 53, 49-54.
The paper deals with the simplified mesoscopic model for describing the membrane purifying process. The problem of working out the reliable models and the appropriate calculating methods is very important both for extracting valuable components and for purifying gases from hazardous substances. The main supposition of the model is that mass transfer through the microporous crystalline films is determined by a superposition of two streams. The first stream is the diffusion stream described by the Fick law, and the second stream is conditioned by the random walk of molecules about active centres of the grid. It is supposed that characteristic time delay of diffusing substance inside the membrane is proportional to the probability of its capturing by active centres into the membrane. On the base of such consideration the asymptotic analysis of the submitted concept has been carried out.
