skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Transportation Research Center (NTRC)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1295099
Grant/Contract Number:  
AC05-00OR22725
Resource 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
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

Citation Formats

Ruggeri, Maria Pia, Selleri, Tomasso, Nova, Isabella, Tronconi, Enrico, Pihl, Josh A., Toops, Todd J., and Partridge, Jr., William P. New mechanistic insights in the NH3-SCR reactions at low temperature. United States: N. p., 2016. Web. doi:10.1007/s11244-016-0567-1.
Ruggeri, Maria Pia, Selleri, Tomasso, Nova, Isabella, Tronconi, Enrico, Pihl, Josh A., Toops, Todd J., & Partridge, Jr., William P. New mechanistic insights in the NH3-SCR reactions at low temperature. United States. doi:10.1007/s11244-016-0567-1.
Ruggeri, Maria Pia, Selleri, Tomasso, Nova, Isabella, Tronconi, Enrico, Pihl, Josh A., Toops, Todd J., and Partridge, Jr., William P. Fri . "New mechanistic insights in the NH3-SCR reactions at low temperature". United States. doi:10.1007/s11244-016-0567-1. https://www.osti.gov/servlets/purl/1295099.
@article{osti_1295099,
title = {New mechanistic insights in the NH3-SCR reactions at low temperature},
author = {Ruggeri, Maria Pia and Selleri, Tomasso and Nova, Isabella and Tronconi, Enrico and Pihl, Josh A. and Toops, Todd J. and Partridge, Jr., William P.},
abstractNote = {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.},
doi = {10.1007/s11244-016-0567-1},
journal = {Topics in Catalysis},
number = 10-12,
volume = 59,
place = {United States},
year = {2016},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

A Common Intermediate for N 2 Formation in Enzymes and Zeolites: Side-On Cu-Nitrosyl Complexes
journal, August 2013

  • Kwak, Ja Hun; Lee, Jong H.; Burton, Sarah D.
  • Angewandte Chemie International Edition, Vol. 52, Issue 38
  • DOI: 10.1002/anie.201303498

Experimental Study of the NO Oxidation to NO2 Over Metal Promoted Zeolites Aimed at the Identification of the Standard SCR Rate Determining Step
journal, February 2013

  • Ruggeri, Maria Pia; Nova, Isabella; Tronconi, Enrico
  • Topics in Catalysis, Vol. 56, Issue 1-8
  • DOI: 10.1007/s11244-013-9937-0

Operando Spatially- and Time-Resolved XAS Study on Zeolite Catalysts for Selective Catalytic Reduction of NO x by NH 3
journal, May 2014

  • Doronkin, Dmitry E.; Casapu, Maria; Günter, Tobias
  • The Journal of Physical Chemistry C, Vol. 118, Issue 19
  • DOI: 10.1021/jp5028433

In Situ-DRIFTS Study of Selective Catalytic Reduction of NO x by NH 3 over Cu-Exchanged SAPO-34
journal, April 2013

  • Wang, Di; Zhang, Li; Kamasamudram, Krishna
  • ACS Catalysis, Vol. 3, Issue 5
  • DOI: 10.1021/cs300843k

In-situ DRIFTS measurements for the mechanistic study of NO oxidation over a commercial Cu-CHA catalyst
journal, May 2015


Investigation of NO2 and NO interaction with an Fe-ZSM-5 catalyst by transient response methods and chemical trapping techniques
journal, August 2015


A comparative study of the NH3-SCR reactions over a Cu-zeolite and a Fe-zeolite catalyst
journal, June 2010


Selective Catalytic Reduction of NO x over H-ZSM-5 Under Lean Conditions Using Transient NH 3 Supply
journal, July 2004


Detailed kinetic modeling of NH3 SCR over Cu-ZSM-5
journal, October 2009

  • Sjövall, Hanna; Blint, Richard J.; Olsson, Louise
  • Applied Catalysis B: Environmental, Vol. 92, Issue 1-2
  • DOI: 10.1016/j.apcatb.2009.07.020

In situ DRIFTS-MS studies on the oxidation of adsorbed NH3 by NOx over a Cu-SSZ-13 zeolite
journal, April 2013


NO2 adsorption on Fe- and Cu-zeolite catalysts: The effect of the catalyst red–ox state
journal, January 2012


NH3–NO/NO2 SCR for Diesel Exhausts Aftertreatment: Reactivity, Mechanism and Kinetic Modelling of Commercial Fe- and Cu-Promoted Zeolite Catalysts
journal, July 2009

  • Grossale, Antonio; Nova, Isabella; Tronconi, Enrico
  • Topics in Catalysis, Vol. 52, Issue 13-20
  • DOI: 10.1007/s11244-009-9354-6

    Works referencing / citing this record: