Effet des cations extra-réseau de la zéolithe Y sur l’activité catalytique du palladium dans la réaction de combustion du méthane

Abstract

Alkali and alkaline earth metal cations were introduced into zeolite to explore their influence on the activity of supported palladium in the total combustion of methane and to study how the acido-basic properties of the support affected the structure and the oxidation state of Pd. The results show that all samples exhibit a slight activation with time. Moreover, at temperatures below 430 °C, PdLiNaY seems to be the most active catalyst, while PdHY is the most active sample at higher temperatures. Except for PdHY, all Pd catalysts lead to an activation energy (Ea) value in the range of 79–97 kJ mol–1.