Characterization of Pd and In species in PdInH-mordenite for the SCR of NOx with methane

HERNÁN DECOLATTI, FERENC LÓNYI, HANNA SOLT, EDUARDO MIRÓ, LAURA GUTIERREZ

Valencia

Conferencia; 5th International FEZA Conference; 2011

The abatement of the NOx emissions of small power plants or engines that use natural gas is a problem difficult to solve when working under lean conditions. In this sense, the proposed reduction of NOx on zeolitic catalysts or oxides with methane has produced promising results . Different metals exchanged in ZSM5 and ferrierite have been reported as active catalysts for this reaction. It is usually accepted that the oxidation of NO to NO2 is an important step in the reaction under study . Moreover, on In-zeolite catalysts, InO+ species are associated with a high NOx adsorption capacity which in turn favors the reaction rate. In this work we used several techniques to characterize the generated species when indium and palladium were exchanged in H-mordenite and the effect of the Pd/In ratio on the said species was investigated. We studied the activity of In-Hmordenite catalysts obtained by reductive solidstate ion exchange and the effect of the addition of Pd.