Investigation of the mechanism of water transfer in catalysts and adsorbents

Drying is a key stage in numerous technological processes in the preparatio n of adsorbents and catalysts. A very efficient method preserving the quali ty of dried material is adsorption-contact drying (ACD). To calculate the r ate of the mass transfer in the process of the ACD, it is necessary to have the data on the ratio between the gas-phase and liquid-phase transfer of m oisture. A method to determine the rates for gas-phase and liquid-phase tra nsfer of moisture in the process of mass transfer in porous materials is su ggested. The data obtained agree well with the existing theoretical concept s about the liquid-phase transfer of moisture under the mechanical contact of two porous bodies. (C) 2000 Elsevier Science B.V. All rights reserved.