Cu-ETS-10催化NH3选择性还原NOx性能

采用离子交换法制备了Cu-ETS-10钛硅分子筛催化剂，该催化剂对于NH₃选择性催化还原（SCR）NO_x反应具有较高的催化活性、N₂选择性和抗SO₂性能.结果表明，Cu-ETS-10钛硅分子筛具有丰富的微孔结构和较高的比表面积（288-380m²/g）；原子发射光谱、程序升温还原技术和原位红外漫反射等表征结果表明，Cu在Cu-ETS-10钛硅分子筛中具有多种存在形态，其中Cu²⁺物种为Cu-ETS-10的活性中心，其含量随Cu含量的增加而先增后降，与催化活性的变化趋势一致.

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

Ion exchange method was used to fabricate Cu-ETS-10 titanosilicate catalysts, which possessed high activity, N₂ selectivity and SO₂ resistance for NO_x selective catalytic reduction (SCR). N₂ sorption measurements indicated that the microporous catalysts had high surface areas of 288-380 m²/g. The Cu content and speciation were investigated by inductively coupled plasma atomic emission spectrometry, H₂ temperature-programmed reduction, and diffuse reflectance infrared Fourier transform spectroscopy. Various Cu species coexisted within the catalyst. Isolated Cu²⁺ species were the active sites for NH₃-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 Cu²⁺ species content.