Abstract
Cd- and Zn-form ferrierites were obtained by reacting the mixture of zeolite H-ferrierite and the powder of cadmium or zinc metal. Hydrogen was detected as reaction product, suggesting that the metal was oxidized by the zeolite protons. The reaction was characterized by the rate of H 2 evolution using the temperature-programmed reaction (TPRc) method. The H 2 -TPRc peak was found to appear at lower temperature for the more volatile Cd metal and for the H-ferrierite, having higher Si-to-Al ratio and containing less extra-framework aluminum (EFAl) species in the zeolite channels. Results suggested that the diffusion rate of the metal vapor within the micropores governed the rate of the reaction.
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