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SCR catalyst coated on low-cost monolith support for flue gas denitration of industrial furnaces
Yang, Juan1; Ma, Hongtao2; Yamamoto, Yo2; Yu, Jian1; Xu, Guangwen1; Zhang, Zhanguo3; Suzuki, Yoshizo3
AbstractNH3-SCR honeycomb catalyst was prepared by coating powdery active metal components on the surface of blank monolith supports and tested at the temperatures of 250-350 degrees C, and superficial gas velocities of 5.3-6.3 m/s. The tests were performed with a simulated gas mixture containing NO, SO2, O-2, H2O and N-2 or a real flue gas produced on line. The results showed that the coated honeycomb catalyst has an extraordinary high activity for low-temperature deNO(x) in the presence of 5 vol.% steam and 1000 ppm SO2. Its activity increased with increasing the coating thickness and reached at 110 mu m thickness as comparable as that of the 100% active components-molded catalyst, suggesting the deNO(x) reaction proceeded mainly in the surface layers of the honeycomb cell wall and hence coated honeycomb catalyst should be more cost-efficient than 100% active components-molded one. In a real coal-burned flue gas stream the catalyst maintained essentially its low temperature activity and stability, further verifying its high industrial applicability. Then, the effects of NO concentration and NH3/NO ratio on NO conversion were investigated to seek a suitable kinetic model for prediction of the catalyst's deNO(x) rate and reactor design for pilot plant research. The data obtained showed that a simple power-law kinetic equation with first order in NO and zero order in ammonia can be applied to the coated honeycomb catalyst, and was used for determination of the kinetic parameters. Finally, simulation calculation was performed under arbitrary conditions to provide valuable information for design of pilot-plant scale reactors. (C) 2013 Elsevier B.V. All rights reserved.
KeywordCoating Honeycomb Catalyst Scr No Conversion Prediction Flue Gas Industrial Furnace
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000324663100062
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Meidensha Corp, Res & Dev Grp, Mat Res Labs, Mat Res Dept, Tokyo 1418565, Japan
3.Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan
Recommended Citation
GB/T 7714
Yang, Juan,Ma, Hongtao,Yamamoto, Yo,et al. SCR catalyst coated on low-cost monolith support for flue gas denitration of industrial furnaces[J]. CHEMICAL ENGINEERING JOURNAL,2013,230(0):513-521.
APA Yang, Juan.,Ma, Hongtao.,Yamamoto, Yo.,Yu, Jian.,Xu, Guangwen.,...&Suzuki, Yoshizo.(2013).SCR catalyst coated on low-cost monolith support for flue gas denitration of industrial furnaces.CHEMICAL ENGINEERING JOURNAL,230(0),513-521.
MLA Yang, Juan,et al."SCR catalyst coated on low-cost monolith support for flue gas denitration of industrial furnaces".CHEMICAL ENGINEERING JOURNAL 230.0(2013):513-521.
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