Journal
CHINESE JOURNAL OF CATALYSIS
Volume 36, Issue 11, Pages 1886-1899Publisher
ELSEVIER
DOI: 10.1016/S1872-2067(15)60958-5
Keywords
deNO(x); Selective catalytic reduction; Vanadate; Transition metal
Funding
- National Natural Science Foundation of China [21303099]
- National Basic Research Program of China (973 Program) [2014CB660803]
- Shanghai Municipal Education Commission [14ZZ097, B.3704713001]
- Research Fund for Innovation Program of Shanghai University [K.10040713003]
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Different transition metals were used to modify V2O5-based catalysts (M-V, M = Cu, Fe, Mn, Co) on TiO2 via impregnation, for the selective reduction of NO with NH3. The introduced metals induced high dispersion in the vanadium species and the formation of vanadates on the TiO2 support, and increased the amount of surface acid sites and the strength of these acids. The strong acid sites might be responsible for the high N-2 selectivity at higher temperatures. Among these catalysts, Cu-V/TiO2 showed the highest activity and N-2 selectivity at 225-375 degrees C. The results of X-ray photoelectron spectroscopy, NH3-temperature-programmed desorption, and in-situ diffuse reflectance infrared Fourier transform spectroscopy suggested that the improved performance was probably due to more active surface oxygen species and increased strong surface acid sites. The outstanding activity, stability, and SO2/H2O durability of Cu-V/TiO2 make it a candidate to be a NO removal catalyst for stationary flue gas. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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