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Analysis of Mn valence in the Mn based catalyst for NH3-SCR process

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DOI: 10.23977/metf.2018.21001 | Downloads: 29 | Views: 4241


Weizhe Lu 1, Xianji Zhou 1, Zhekai Zhang 1


1 Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Corresponding Author

Zhekai Zhang


A series of MnWOx/TiO2 catalysts were prepared by liquid phase deposition. The MnWOx/TiO2 catalyst was characterized by N2 physical adsorption, X-ray diffraction, H2 programmed temperature reduction, transmission electron microscopy and X-ray electron spectroscopy, and their NH3-SCR performance were tested. The effect of Mn valence on the NH3-SCR performance of MnWOx/TiO2 catalyst was analyzed and discussed. The results show that the active components are uniformly dispersed on the surface, and the average valence of manganese are different. The average valence state of manganese in Mn3WOx/TiO2 catalyst is the highest and the activity at low temperature is the best. On the contrary, the average valence of manganese in MnWOx/TiO2 catalyst is the lowest while the N2 selectivity is the best, which means that high valence of manganese is beneficial to its low temperature activity while low valence is favorable for its N2 selectivity.


NOx removal, Mn based catalyst, Valence, Low temperature activity, N2 selectivity.


Weizhe, L., Xianji, Z., Zhekai, Z., Analysis of Mn valence in the Mn based catalyst for NH3-SCR process. Metallic foams (2018) 2: 60-68.


[1] Ronald, M.H., (1999) Catalytic abatement of nitrogen oxides-stationary applications, Catalysis Today, 53(4): 519-523. 
[2] Seinfeld, J.H., (1989) Urban air pollution: state of the science, Science, 243(4892): 745-752.
[3] Tion, H.Z., Liu, K.Y., Hao, J.M., (2013) Nitrogen Oxides Emissions from Thermal Power Plants in China: Current Status and Future Predictions. Environmental Science & Technology, 47, 11350-11357.
[4] Tadao, N., Akira, M., (1991) Removal technology for nitorogen oxides and sulfur oxides from exhaust gases, Catalysis Today, 10(1): 21-31.
[5] Chen, L., Si, Z.H., Wu, X.D., et al. (2014) Rare earth containing catalysts for selective catalytic reduction of NOx with ammonia: A Review. Journal of Rare Earths, 32(10):907-917.
[6] Liu, C., Shi, J.W., Gao, C., et al. (2016) Manganese oxide-based catalysts for low-temperature selective atalytic reduction of NOx with NH3: A review. Applied Catalysis A: General, 522: 54-69.
[7] Chae, H.J., Nam, I.S., Ham, S.W., et al. (2004) Characteristies of vanadia on the surface of V2O5/Ti-PILC catalyst for the reduetion of NO by NH3. Applied Catalysis B: Environmental, 53(2): 117-126.
[8] Djerad, S. Tifouti, L., Crocoll, M., Weisweiler, W., (2004) Effect of vanadia and tungsten loadings on the physical and chemical characteristics of V2O5-WO3/TiO2 catalysts, Journal of Molecular Catalysis A: Chemical, 208(1-2): 257-265.
[9] Evgenii, V.K.., Javier, P.R., (2005) Transient studies on the effete of oxygen on the high-temperature NO reduction by NH3 over Pt-Rh gauze, Applied Catalysis A: General, 289(1): 97-103.
[10] Zhang, Q.L., Qiu, C.T., Xu, H.D., et al. (2011) Novel promoting effects of tungsten on the selective catalytic reduction of NO by NH3 over MnOx-CeO2 monolith catalyst. Catalysis Communications, 16(1):20-24.
[11] Yang, S.J., Wang, C.Z., Li, J.H., et al. (2011) Low temperature selective catalytic reduction of NO with NH3 over Mn-Fe spinel: Performance, mechanism and kinetic study. Applied Catalysis B: Environmental, 110(41):71-80.
[12] Huang, H.Y., Yang, R.T., (2001) Removal of NO by Reversible Adsorption on Fe-Mn Based Transition Metal Oxides. Langmuir, 17(16):4997-5003.
[13] Kapteijn, F., Singoredjo, L., Andrrini A. (1994) Activity and selectivity of pure manganese oxides in the selective catalytic reduction of nitric oxide with ammonia. Applied Catalysis B: Environmental, 3(2-3): 173-189.
[14] Tatsuji, Y., Albert, V., (1996) NO Decomposition over Mn2O3 and Mn3O4. Journal of Catalysis, 163(1):158-168.
[15] Tang, X.F., Li, J.H., Sun, L., et al. (2010) Origination of N2O from NO reduction by NH3 over β-MnO2 and α-Mn2O3. Applied Catalysis B: Environmental, 99(1-2): 156-162.
[16] Liu, F.D., Shan, W.P., Lian, Z.H., et al. (2013) Novel MnWOx catalyst with remarkable performance for low temperature NH3-SCR of NOx. Catalysis Science & Technology, 3(10): 2699-2707.
[17] Li, X., Lunkenbein, T., Pfeifer, V., et al. (2016) Selective Alkane Oxidation by Manganese Oxide: Site Isolation of MnOx Chains at the Surface of MnWO4 Nanorods. Angewandte Chemie, 55(12):4092-4096.
[18] Padmanabha, R.E., Neeraja, E., Sergey, M., et al. (2007) Surface characterization studies of TiO2 supported manganese oxide catalysts for low temperature SCR of NO with NH3. Applied Catalysis B: Environmental, 76(1-2): 123-134.

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