Titanium-pillared clays （Ti-PILCs） were obtained by different ways from TiCl4, Ti（OC3H7）4 and TiOSO4, respectively. Mn-CeOx/Ti- PILCs were then prepared and their activities of selective catalytic reduction （SCR...Titanium-pillared clays （Ti-PILCs） were obtained by different ways from TiCl4, Ti（OC3H7）4 and TiOSO4, respectively. Mn-CeOx/Ti- PILCs were then prepared and their activities of selective catalytic reduction （SCR） of NO with NH3 at low-temperature were evaluated. Mn-CeOx/Ti-PILCs were characterized by X-ray diffraction, N2 adsorption, Fourier transform infrared spectroscopy, thermal analysis, temperature-programmed desorption of ammonia and H2-temperature-programmed reduction. It was found that Ti-pillar tend to be helpful for the enlargement of surface area, pore volume, acidity and the enhancement of thermal stability for Mn-CeOx/Ti-PILCs. Mn- CeOx/Ti-PILCs catalysts were active for the SCR of NO. Among three resultant Mn-CeOx/Ti-PILCs, the catalyst from TiOSO4 showed the highest activity with 98% NO conversion at 220°C, it also exhibited good resistance to H2O and SO2 in flue gas. The catalyst from TiCl4 exhibited the lowest activity due to the unsuccessful pillaring process.展开更多
A series of CrOx–CeO2/Ti-PILC(PILC is pillared interlayered clay)catalysts for n-butylamine oxidation were prepared using an impregnation method,and the structures,surface acidity distributions,and redox properties o...A series of CrOx–CeO2/Ti-PILC(PILC is pillared interlayered clay)catalysts for n-butylamine oxidation were prepared using an impregnation method,and the structures,surface acidity distributions,and redox properties of the catalysts were characterized using X-ray diffraction,X-ray photoelectron spectroscopy,transmission electron microscopy,H2temperature-programmed reduction,and NH3temperature-programmed desorption.The results show that addition of an appropriate amount of CeO2enhances the interactions between Cr and Ce,and this increases the acid strength and mobility of active oxygen species on the catalyst.8CrCe(6:1)/Ti-PILC(12,20)exhibits the best catalytic performance and control of NOxin n-butylamine oxidation.展开更多
基金supported by the National Natural Science Foundation of China (No. 50976050, 51176077)the Research Fund for International Young Scientists (NO.51150110155)
文摘Titanium-pillared clays （Ti-PILCs） were obtained by different ways from TiCl4, Ti（OC3H7）4 and TiOSO4, respectively. Mn-CeOx/Ti- PILCs were then prepared and their activities of selective catalytic reduction （SCR） of NO with NH3 at low-temperature were evaluated. Mn-CeOx/Ti-PILCs were characterized by X-ray diffraction, N2 adsorption, Fourier transform infrared spectroscopy, thermal analysis, temperature-programmed desorption of ammonia and H2-temperature-programmed reduction. It was found that Ti-pillar tend to be helpful for the enlargement of surface area, pore volume, acidity and the enhancement of thermal stability for Mn-CeOx/Ti-PILCs. Mn- CeOx/Ti-PILCs catalysts were active for the SCR of NO. Among three resultant Mn-CeOx/Ti-PILCs, the catalyst from TiOSO4 showed the highest activity with 98% NO conversion at 220°C, it also exhibited good resistance to H2O and SO2 in flue gas. The catalyst from TiCl4 exhibited the lowest activity due to the unsuccessful pillaring process.
基金supported by the National Natural Science Foundation of China (21177110)
文摘A series of CrOx–CeO2/Ti-PILC(PILC is pillared interlayered clay)catalysts for n-butylamine oxidation were prepared using an impregnation method,and the structures,surface acidity distributions,and redox properties of the catalysts were characterized using X-ray diffraction,X-ray photoelectron spectroscopy,transmission electron microscopy,H2temperature-programmed reduction,and NH3temperature-programmed desorption.The results show that addition of an appropriate amount of CeO2enhances the interactions between Cr and Ce,and this increases the acid strength and mobility of active oxygen species on the catalyst.8CrCe(6:1)/Ti-PILC(12,20)exhibits the best catalytic performance and control of NOxin n-butylamine oxidation.
