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:
-
- Politecnico di Milano (Italy). Dipartimento di Energia
- 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:
- Journal Article: 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. https://doi.org/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. 2016.
"New mechanistic insights in the NH3-SCR reactions at low temperature". United States. https://doi.org/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},
url = {https://www.osti.gov/biblio/1295099},
journal = {Topics in Catalysis},
issn = {1022-5528},
number = 10-12,
volume = 59,
place = {United States},
year = {Fri May 06 00:00:00 EDT 2016},
month = {Fri May 06 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
Analysis of AdSCR Systems for NOx Removal During the Cold-Start Period of Diesel Engines
journal, January 2019
- Gramigni, Federica; Selleri, Tommaso; Nova, Isabella
- Topics in Catalysis, Vol. 62, Issue 1-4
A PGM-free NO x adsorber + selective catalytic reduction catalyst system (AdSCR) for trapping and reducing NO x in lean exhaust streams at low temperature
journal, January 2018
- Selleri, Tommaso; Gramigni, Federica; Nova, Isabella
- Catalysis Science & Technology, Vol. 8, Issue 9
Temperature-dependent dynamics of NH 3 -derived Cu species in the Cu-CHA SCR catalyst
journal, January 2019
- Borfecchia, Elisa; Negri, Chiara; Lomachenko, Kirill A.
- Reaction Chemistry & Engineering, Vol. 4, Issue 6
Catalyst systems for selective catalytic reduction + NO x trapping: from fundamental understanding of the standard SCR reaction to practical applications for lean exhaust after-treatment
journal, January 2019
- Gramigni, Federica; Selleri, Tommaso; Nova, Isabella
- Reaction Chemistry & Engineering, Vol. 4, Issue 7