Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0926-3373(03)00108-5
Title: Selective catalytic reduction of NO by hydrocarbons in the presence of excess oxygen using Pt/MCM-41 catalysts
Authors: Shen, S.-C. 
Kawi, S. 
Keywords: DeNOx
In situ FTIR
In situ XRD
MCM-41
Platinum
Ruthenium
SCR
Issue Date: 25-Sep-2003
Citation: Shen, S.-C., Kawi, S. (2003-09-25). Selective catalytic reduction of NO by hydrocarbons in the presence of excess oxygen using Pt/MCM-41 catalysts. Applied Catalysis B: Environmental 45 (1) : 63-76. ScholarBank@NUS Repository. https://doi.org/10.1016/S0926-3373(03)00108-5
Abstract: The selective catalytic reduction of NO by C3H6 and C3H8 in the presence of 5% O2 over 0.5-2% Pt supported on siliceous MCM-41 has been studied in detail. Pt/MCM-41 shows better activity for NO reduction than Pt/SiO2 and Pt/Al 2O3 under the same reaction conditions due to the larger surface area and pore volume of MCM-41. Two types of Pt species having different reduction temperatures (50-200, 350-500°C, respectively) are formed on Pt/MCM-41. The Pt species having lower reduction temperature is suggested to be responsible for the selective reduction of NO. A redox mechanism is used to explain this behavior. In addition to its high stability in the presence of water vapor, Pt/MCM-41 shows high resistance to SO 2 without irreversible deactivation due to its weak interaction with SO2. The activity of Pt/MCM-41 catalyst is found to be improved in the presence of A1 species both in the framework or on the surface of MCM-41 support, possibly due to the improvement of the acidity of Pt/MCM-41 by A1 species. In situ XRD result indicates that the surface A1-species prevent the active Pt from sintering at high temperature, hence improving the thermal stability of Pt/MCM-41. Having additive Ru species, Pt/Ru/Si-MCM-41 is found to widen the reaction window and decrease the selectivity of the conversion of NO to N2O during the SCR of NO; this is an important finding for overcoming the main shortcoming of Pt-based catalyst. © 2003 Elsevier Science B.V. All rights reserved.
Source Title: Applied Catalysis B: Environmental
URI: http://scholarbank.nus.edu.sg/handle/10635/92323
ISSN: 09263373
DOI: 10.1016/S0926-3373(03)00108-5
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

62
checked on May 15, 2018

WEB OF SCIENCETM
Citations

59
checked on May 8, 2018

Page view(s)

39
checked on May 11, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.