1. Low-temperature selective catalytic reduction of NO on CeO 2 –CuO/Al 2 O 3 catalysts prepared by different methods.
- Author
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Guo, Rui-tang, Zhen, Wen-long, Pan, Wei-guo, Hong, Jie-nan, Jin, Qiang, Ding, Cheng-gang, and Guo, Shi-yi
- Subjects
SELECTIVE catalytic oxidation ,X-ray diffraction ,NITRIC oxide ,AMMONIA ,X-ray photoelectron spectroscopy - Abstract
CeO2–CuO/Al2O3catalysts were prepared by three different methods and their activities for selective catalytic reduction (SCR) of NO with NH3were investigated. As can be seen from the experimental results, the catalyst prepared by the single-step sol–gel (SG) method showed the best SCR activity and resistance to SO2and H2O. In order to investigate the relationship between the preparation method and the performance of SCR catalysts, the catalysts were characterized by using Brunauer–Emmett–Teller, X-ray diffraction, temperature programmed reduction with hydrogen, temperature programmed desorption with ammonia, X-ray photoelectron spectroscopy, Fourier transform infrared and thermo-gravimetric analysis techniques. It was found that the excellent performance of CeO2–CuO/Al2O3catalyst prepared by the single-step SG method should be resulted from its large surface area, low crystallinity, high oxygen storage capacity, high NH3adsorption capacity, high concentration of surface chemisorbed oxygen, weak sulphation process and weak water absorption. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
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