skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on May 6, 2017

Title: New mechanistic insights in the NH3-SCR reactions at low temperature

The present study is focused on the investigation of the low temperature Standard SCR reaction mechanism over Fe- and Cu-promoted zeolites. Different techniques are employed, including in situ DRIFTS, transient reaction analysis and chemical trapping techniques. The results present strong evidence of nitrite formation in the oxidative activation of NO and of their role in SCR reactions. These elements lead to a deeper understanding of the standard SCR chemistry at low temperature and can potentially improve the consistency of mechanistic mathematical models. Furthermore, comprehension of the mechanism on a fundamental level can contribute to the development of improved SCR catalysts.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2]
  1. Politecnico di Milano (Italy). Dipartimento di Energia
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels Engines and Emissions Research Center
Publication Date:
OSTI Identifier:
1295099
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Topics in Catalysis
Additional Journal Information:
Journal Volume: 59; Journal Issue: 10-12; Journal ID: ISSN 1022-5528
Publisher:
Springer
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center; National Transportation Research Center (NTRC)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY low temperature SCR; Cu zeolite; Fe zeolite; SCR mechanism; in situ DRIFTS; chemical trapping