The mobility of cations in synthetic zeolites with the faujasite framework — V: The self-diffusion of zinc into X and Y zeolites

Abstract

Self-diffusion parameters of zinc into zeolites X and Y, of Si:Al atios of 1·26, 1·87 and 2·62 respectively, have been determined at low and high temperatures. Derived values of E A and ΔS‡ have been rationalized in terms of mechanisms in which water played an important part, and a possible explanation for anomalous results obtained with X at low temperatures has been put forward.