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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

2018 Impact Factor: 3.883

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Front Envir Sci Eng    2013, Vol. 7 Issue (3) : 457-463    https://doi.org/10.1007/s11783-013-0512-5
RESEARCH ARTICLE
The effect of preparation conditions of Pt/Al2O3 on its catalytic performance for the H2-SCR in the presence of oxygen
Lei YUAN1, Xiang ZHENG2, Kaijiao DUAN1, Hao HU1, Jinggang WANG1, Seong Ihl WOO3, Zhiming LIU1()
1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 2. School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China; 3. Department of Chemical and Biomolecular Engineering, Graduate School of EEWS(WCU), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
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Abstract

Selective catalytic reduction of NOx by H2 in the presence of oxygen has been investigated over Pt/Al2O3 catalysts pre-treated under different conditions. Catalyst preparation conditions exert significant influence on the catalytic performance, and the catalyst pre-treated by H2 or H2 then followed by O2 is much more active than that pre-treated by air. The higher surface area and the presence of metallic Pt over Pt/Al2O3 pre-treated by H2 or pretreated by H2 then followed by O2 can contribute to the formation of NO2, which then promotes the reaction to proceed at low temperatures.
Keywords NOx reduction      Pt/Al2O3      preparation condition      H2-SCR     
Corresponding Author(s): LIU Zhiming,Email:liuzm@mail.buct.edu.cn   
Issue Date: 01 June 2013
 Cite this article:   
Jinggang WANG,Seong Ihl WOO,Zhiming LIU, et al. The effect of preparation conditions of Pt/Al2O3 on its catalytic performance for the H2-SCR in the presence of oxygen[J]. Front Envir Sci Eng, 2013, 7(3): 457-463.
 URL:  
https://academic.hep.com.cn/fese/EN/10.1007/s11783-013-0512-5
https://academic.hep.com.cn/fese/EN/Y2013/V7/I3/457
Fig.1  The effect of pre-treatment on the performance of Pt/AlO catalysts for the NO reduction with H.
Reaction conditions: NO= 0.25%, H = 0.75%, O = 5%, GHSV= 35000 h
Fig.2  The catalytic performance of Pt(H-500-O-400) catalyst as a function of the concentration of H (a) and O(b) at 150°C. Reaction conditions: NO= 0.25%, H = 0.375%-1.5%, O = 2%-10%, GHSV= 35000 h
Fig.3  The effect of space velocity of feed gas on the catalytic performance of Pt(H-500-O-400) catalyst. Reaction conditions: NO= 0.25%, H = 0.75%, O = 5%, GHSV= 17500-35000 h
catalystsurface area/(m2·g-1)
Pt(Air-500)273
Pt(H2-500)318
Pt(H2-500-O2-400)326
Tab.1  Specific surface areas of three different Pt/AlO catalysts
Fig.4  XRD patterns of Pt(Air-500) (a), Pt(H-500) (b) and Pt(H-500-O-400) (c) catalysts
Fig.5  TEM images of Pt(Air-500)(a), Pt(H-500)(b) and Pt(H-500-O-400)(c) catalysts
Fig.6  H-TPR profile over AlO(a), Pt(Air-500)(b), Pt(H-500)(c) and Pt(H-500-O-400)(d) catalysts
Fig.7  NO-TPD of NO(a) and NO (b) profile over AlO and Pt/AlO catalysts
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