Kinetics of gas-solid reactions in α-zirconium phosphate. H+/Na+ mixed diffusion coefficients
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The rates of reaction between gaseous HCl and sodium ion exchanged phases of α-zirconium phosphate have been measured. The reactions are diffusion controlled and were fit by an equation for diffusion in a sphere from a well stirred fluid of limited volume (Carman and Haul equation). Diffusion coefficients were of the order of 10-15-10-12 cm2/sec in the temperature range 25°-220°C. These coefficients are in the same range as those determined from self-diffusion studies but are several orders of magnitude smaller than those obtained from rates of exchange. Possible reasons for this discrepency are given. © 1981.
author list (cited authors)
Jerus, P., & Clearfield, A.