Measurement of effective diffusivity from effluent concentration of a flow through diffusion cell

Abstract

Abstract The overall effective diffusion coefficient for 3.3 mm extrudates of 5A Zeolite and CO 2 /N 2 at 292°K and 142 kN/m 2 was measured in a continually purged, well mixed, constant volume diffusion cell. The change of CO 2 concentration in the effluent stream resulting from a step change in the influent stream was used with appropriate parameters in the analytical solution to calculate diffusion coefficients for the 0 to 0.1 vol. % and 0.1 to 1.0 vol. % CO 2 concentration ranges.