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

V. Petranovskii, A. Simakov, F. Chavez-Rivas, R. Zamorano-Ulloa, R. Marzke, A. Efimov, A. Pestryakov, M. Á Hernández Espinosa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 N 2 and O 2 by hydrocarbons reach 95-98 % depending on the catalyst composition.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsM.W. McCall, G. Dewar
Pages259-267
Number of pages9
Volume5508
DOIs
Publication statusPublished - 2004
EventComplex Mediums V: Light and Complexity - Denver, CO, United States
Duration: 4 Aug 20045 Aug 2004

Other

OtherComplex Mediums V: Light and Complexity
CountryUnited States
CityDenver, CO
Period4.8.045.8.04

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Keywords

  • Cluster
  • Copper
  • de-NO
  • Mordenite
  • Nanoparticles
  • NMR
  • SiO /Al O
  • UV-Vis

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Petranovskii, V., Simakov, A., Chavez-Rivas, F., Zamorano-Ulloa, R., Marzke, R., Efimov, A., Pestryakov, A., & Espinosa, M. Á. H. (2004). Formation of copper nano-species of de-NOx catalysts based on Cu-mordenite: Role of variable silica-alumina ratio and effects of adsorbed water. In M. W. McCall, & G. Dewar (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5508, pp. 259-267). [37] https://doi.org/10.1117/12.560285