Xuehong Zi

NOx selective catalytic reduction by ammonia over Cu-ETS-10 catalysts

Abstract Ion exchange method was used to fabricate Cu-ETS-10 titanosilicate catalysts, which possessed high activity, N 2 selectivity and SO 2 resistance for NO x selective catalytic reduction (SCR). N 2 sorption measurements indicated that the microporous catalysts had high surface areas of 288–380 m 2 /g. The Cu content and speciation were investigated by inductively coupled plasma atomic emission spectrometry, H 2 temperature-programmed reduction, and diffuse reflectance infrared Fourier transform spectroscopy. Various Cu species coexisted within the catalyst. Isolated Cu 2+ species were the active sites for NH 3 -SCR, the number of which initially increased and then decreased with increasing Cu content. The catalytic activity of Cu-ETS-10 depended on the isolated Cu 2+ species content.