Formation of copper nanospecies of de-NOx catalysts based on Cu-mordenite: role of variable silica-alumina ratio and effects of adsorbed water

Vitalii P. Petranovskii; Andrey V. Simakov; Fernando Chavez-Rivas; R. Zamorano-Ulloa; Robert Marzke; Andrey Efimov; A. Pestryakov; M.-A. Hernandez Espinosa

doi:10.1117/12.560285

2 August 2004 Formation of copper nanospecies of de-NO_x catalysts based on Cu-mordenite: role of variable silica-alumina ratio and effects of adsorbed water

Vitalii P. Petranovskii, Andrey V. Simakov, Fernando Chavez-Rivas, R. Zamorano-Ulloa, Robert Marzke, Andrey Efimov, A. Pestryakov, M.-A. Hernandez Espinosa

Author Affiliations +

Proceedings Volume 5508, Complex Mediums V: Light and Complexity; (2004) https://doi.org/10.1117/12.560285
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Cu-mordenites catalysts are among the most active available for de-NOx at moderate temperatures. Silica-alumina molar ratio of mordenite supports strongly affects conversion efficiency for NOx. Copper mordenites' rapid deactivation by water has led us to investigate the effects of adsorbed water on framework and extra-framework ions, mainly using NMR of 27Al and 1H. Adsorbed water content has been monitored and controlled in mordenite samples via TGA, as well as by vacuum calcination. Several NMR measurements have been performed to aid in the interpretation of spectra, including variable pulse-delay spin echo and 1H-27Al TRAPDOR. A number of surface characterization techniques have been applied to both H- and Cu-mordenites. Catalytic experiments showed that the reduction of NOx to N2 and O2 by hydrocarbons reach 95-98 % depending on the catalyst composition.

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Vitalii P. Petranovskii, Andrey V. Simakov, Fernando Chavez-Rivas, R. Zamorano-Ulloa, Robert Marzke, Andrey Efimov, A. Pestryakov, and M.-A. Hernandez Espinosa "Formation of copper nanospecies of de-NO_x catalysts based on Cu-mordenite: role of variable silica-alumina ratio and effects of adsorbed water", Proc. SPIE 5508, Complex Mediums V: Light and Complexity, (2 August 2004); https://doi.org/10.1117/12.560285

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