The determination of the diffusion coefficient of water vapor in granulated zeolites by adsorption from a carrier-gas current

Abstract

1. We investigated the adsorption kinetics of water vapor on NaA and NaX granulated zeolites at a concentration of 1.75 mg/liter, 20°C and different carrier-gas velocities. 2. At a current velocity of 1.4 m/sec the approximate value of the diffusion coefficient may be calculated from the equation for internal diffusion, i.e., on the assumption that external mass exchange is infinitely rapid. 3. A measurement procedure with more efficient consumption of carrier-gas is recommended.