Nature Environment and Pollution Technology

Open Access Open Access  Restricted Access Subscription Access

Study on the Application of CuO/Al2O3 Cordierite Ceramic Honeycomb Catalyst in Cleaning the Flue Gas for NOX


Affiliations
1 School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, China
2 China Heavy Machinery Research Institute Co. Ltd., Xi’an 710032, China
3 School of Environmental Science and Engineering, Chang’an University, Xi’an, 710054, China
 

This paper introduces the current research status of denitration catalysts used in Selective Catalytic Reduction (SCR) technology, and assess the effects of a composite catalyst on the denitration performance of flue gas. Laboratory experiments were conducted to prepare a new composite catalyst, that is, CuO loaded on a honeycomb cordierite ceramic catalyst carrier with Al2O3 coating by the equivalent volume impregnation method. The orthogonal designed tests were used to study the effects on denitration performance caused by the changes of Al2O3 loading, calcination temperature and calcination time, obtain the optimum condition for the catalyst carrier preparation with the best denitration rate. Then the effects of CuO loading, calcination temperature and calcination time on denitration rate of the new composite catalyst were investigated. Results showed that: (1) As for catalyst carrier, significance of three factors that had effects on the flue gas denitration rate was in a sequence: loading of Al2O3 > calcination temperature > calcination time. (2) Calcined at 600°C for 4 hours with 3% of Al2O3 loading was the condition to prepare the composite carrier with the best denitration rate. (3) For the new composite catalyst, three noticeable increased-then-decreased trends of denitration rate change were presented with the increasing CuO loading, calcination temperature and calcination time. (4) Calcined at 450°C for 4 hours with 8% CuO loading was the condition to prepare the new composite catalyst with the best denitration rate.

Keywords

Selective Catalytic Reduction, Denitration, Nitric Oxide, Honeycomb Cordierite Ceramic.
User
Notifications
Font Size


  • Forzatti, P. 2001. Present status and perspective in de-NOx, SCR catalysis. Appl. Catal. A, 222(1): 221-236.

  • Lin, C.H. and Bai, H. 2003. Surface acidity over vanadia/titania catalyst in the selective catalytic reduction for NO removal-in situ DRIFTS study. Applied Catalysis B, 42(3): 279-287.

  • Liu, Q., Liu, Z. and Fan, J. 2005. Selective catalytic reduction of NO by NH3 on CuO catalyst supported on honeycomb-like cordierite coated with Al2O3. Chin. J. Catal., 26(1): 59-64.

  • Lowell, P.S., Schwitzgebel, K., Parsons, T.B. and Sladek, K.J. 2001. Selection of metal oxides for removing SO2 from flue gas. Industrial & Engineering Chemistry Process Design and Development, 10(3): 384-390.

  • Macken, C. and Hodnett, B.K. 1998. Reductive regeneration of sulfated CuO/Al2O3 catalyst-sorbents in hydrogen, methane, and steam. Industrial & Engineering Chemistry Research, 37(7): 2611-2617.

  • Macken, C., Hodnett, B.K., Paparatto, G. 2000. Testing of the CuO/Al2O3 catalyst-sorbent in extended operation for the simultaneous removal of NOx and SO2 from flue gases. Chemical Industry, 39(10): 3868-3874.

  • Nakahjima, F. and Hamada, L. 1996. The state-of-the-art technology of NO. Control. Catal. Today, 29(1): 109-115.

  • Ramis, G., Yi, L., Busca, G. et al. 1995. Adsorption activation and oxidation of ammonia over SCR catalysts. Journal of Catalysis, 157(2): 523-535.

  • Su, J., Liu, Q. and Liu, Z. et al. 2008. CuO/Al2O3/Cordierite catalyst for selective catalytic reduction of NO by NH3-effect of Al2O3 coating. Ind. Eng. Chem. Res., 47(13): 4295-4301.

  • Yang, N. and Wang, X. 2010. Nitrogen oxides pollution and prevention. Environmental Protection and Recycling Economy, 11: 63.

  • Ye, S.F. 2000. The study of TPR on MnOx/Al2O3 catalyst. Journal of ZheJiang Normal University, 23: 150.

  • Zhou, Y., Xu, X.H. and Chen, H. 2002. Cordierite honeycomb ceramic carrier. Ceramics Research, 17: 9.


Abstract Views: 146

PDF Views: 0




  • Study on the Application of CuO/Al2O3 Cordierite Ceramic Honeycomb Catalyst in Cleaning the Flue Gas for NOX

Abstract Views: 146  |  PDF Views: 0

Authors

Lei Zhang
School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, China
Xiang-ling Sha
School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, China
Lei Zhang
China Heavy Machinery Research Institute Co. Ltd., Xi’an 710032, China
Zhen-hua Ma
School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, China
Hui-bin He
School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, China
Xi Liu
School of Environmental Science and Engineering, Chang’an University, Xi’an, 710054, China

Abstract


This paper introduces the current research status of denitration catalysts used in Selective Catalytic Reduction (SCR) technology, and assess the effects of a composite catalyst on the denitration performance of flue gas. Laboratory experiments were conducted to prepare a new composite catalyst, that is, CuO loaded on a honeycomb cordierite ceramic catalyst carrier with Al2O3 coating by the equivalent volume impregnation method. The orthogonal designed tests were used to study the effects on denitration performance caused by the changes of Al2O3 loading, calcination temperature and calcination time, obtain the optimum condition for the catalyst carrier preparation with the best denitration rate. Then the effects of CuO loading, calcination temperature and calcination time on denitration rate of the new composite catalyst were investigated. Results showed that: (1) As for catalyst carrier, significance of three factors that had effects on the flue gas denitration rate was in a sequence: loading of Al2O3 > calcination temperature > calcination time. (2) Calcined at 600°C for 4 hours with 3% of Al2O3 loading was the condition to prepare the composite carrier with the best denitration rate. (3) For the new composite catalyst, three noticeable increased-then-decreased trends of denitration rate change were presented with the increasing CuO loading, calcination temperature and calcination time. (4) Calcined at 450°C for 4 hours with 8% CuO loading was the condition to prepare the new composite catalyst with the best denitration rate.

Keywords


Selective Catalytic Reduction, Denitration, Nitric Oxide, Honeycomb Cordierite Ceramic.

References