Abstract
Palladium-based catalysts were prepared by the ion-exchange method with dealuminated HY zeolite as support. The support dealumination was realised using acid solution of HNO3, HCl or H2SiF6. The high activity of prepared catalysts for methane combustion was observed. This activity was dependent on the Al concentration, structural and textural properties of the support changed after the dealumination. Especially, Pd loaded on supports developing a second pore system, and having the highest Si/Al ratio, was more active than that on unmodified supports. It was also expected that the active sites in the methane combustion, which are suspected to be PdO, were influenced by the acidic properties of the support.
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