The SCR of NO over Co-, Co,Pt, and H-mordenite catalysts

F. LÓNYI, J. VALYON, L. GUTIERREZ, M. A. ULLA, E. A. LOMBARDO

Toledo, España

Congreso; Operando - II Second International Congress on Operando Spectroscopy Fundamental and Technical Aspects of Spectroscopy of Catalysts under Working Conditions; 2006

Instituto de Catálisis y Petroleoquimica, CSIC, Madrid, Spain, CNRS, Laboratoire Catalyse & Spectrochimie, Caen, France. Leibniz-Institut für Katalyse,Berlin, Germany. Department of Inorganic Chemistry, Utrecht University, Utrecht, The Netherlands. Univer

An important mechanistic detail of the catalytic NO conversion to N2 is the bond-formation between nitrogen atoms. In the process of selective catalytic NO reduction (SCR of NO) by hydrocarbons the coupling of N-atoms was suggested to proceed in a reaction between two surface intermediates, containing nitrogen atom in 3+ and 3- oxidation state [1]. Nevertheless, different reaction pathways and intermediates were suggested for different catalysts and reductant hydrocarbons [1,2]. The present study is a contribution to the understanding of SCR mechanism of NO by CH4 over Co-, Co,Pt-, and H-mordenite (M) catalysts taking advantage of the operando diffuse reflectance infrared Fourier-transform spectroscopic (DRIFTS) method.