The SCR of NO with CH4 over Co-, Co, Pt-, and H-mordenite catalyst”.

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

Toledo (España)

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

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. 2 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.