Selective catalytic reduction of nitric oxide with ethanol/gasoline blends over a silver/alumina catalyst
Abstract
Lean gasoline engines running on ethanol/gasoline blends and equipped with a silver/alumina catalyst for selective catalytic reduction (SCR) of NO by ethanol provide a pathway to reduced petroleum consumption through both increased biofuel utilization and improved engine efficiency relative to the current stoichiometric gasoline engines that dominate the U.S. light duty vehicle fleet. A pre-commercial silver/alumina catalyst demonstrated high NOx conversions over a moderate temperature window with both neat ethanol and ethanol/gasoline blends containing at least 50% ethanol. Selectivity to NH3 increases with HC dosing and ethanol content in gasoline blends, but appears to saturate at around 45%. NO2 and acetaldehyde behave like intermediates in the ethanol SCR of NO. NH3 SCR of NOx does not appear to play a major role in the ethanol SCR reaction mechanism. Ethanol is responsible for the low temperature SCR activity observed with the ethanol/gasoline blends. In conclusion, the gasoline HCs do not deactivate the catalyst ethanol SCR activity, but they also do not appear to be significantly activated by the presence of ethanol.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1131503
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Journal Article
- Journal Name:
- Catalysis Today
- Additional Journal Information:
- Journal Volume: 231; Journal Issue: 1; Journal ID: ISSN 0920-5861
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; ethanol; SCR; lean NOx; silver alumina
Citation Formats
Pihl, Josh A., Toops, Todd J., Fisher, Galen B., and West, Brian H. Selective catalytic reduction of nitric oxide with ethanol/gasoline blends over a silver/alumina catalyst. United States: N. p., 2014.
Web. doi:10.1016/j.cattod.2013.12.042.
Pihl, Josh A., Toops, Todd J., Fisher, Galen B., & West, Brian H. Selective catalytic reduction of nitric oxide with ethanol/gasoline blends over a silver/alumina catalyst. United States. https://doi.org/10.1016/j.cattod.2013.12.042
Pihl, Josh A., Toops, Todd J., Fisher, Galen B., and West, Brian H. 2014.
"Selective catalytic reduction of nitric oxide with ethanol/gasoline blends over a silver/alumina catalyst". United States. https://doi.org/10.1016/j.cattod.2013.12.042.
@article{osti_1131503,
title = {Selective catalytic reduction of nitric oxide with ethanol/gasoline blends over a silver/alumina catalyst},
author = {Pihl, Josh A. and Toops, Todd J. and Fisher, Galen B. and West, Brian H.},
abstractNote = {Lean gasoline engines running on ethanol/gasoline blends and equipped with a silver/alumina catalyst for selective catalytic reduction (SCR) of NO by ethanol provide a pathway to reduced petroleum consumption through both increased biofuel utilization and improved engine efficiency relative to the current stoichiometric gasoline engines that dominate the U.S. light duty vehicle fleet. A pre-commercial silver/alumina catalyst demonstrated high NOx conversions over a moderate temperature window with both neat ethanol and ethanol/gasoline blends containing at least 50% ethanol. Selectivity to NH3 increases with HC dosing and ethanol content in gasoline blends, but appears to saturate at around 45%. NO2 and acetaldehyde behave like intermediates in the ethanol SCR of NO. NH3 SCR of NOx does not appear to play a major role in the ethanol SCR reaction mechanism. Ethanol is responsible for the low temperature SCR activity observed with the ethanol/gasoline blends. In conclusion, the gasoline HCs do not deactivate the catalyst ethanol SCR activity, but they also do not appear to be significantly activated by the presence of ethanol.},
doi = {10.1016/j.cattod.2013.12.042},
url = {https://www.osti.gov/biblio/1131503},
journal = {Catalysis Today},
issn = {0920-5861},
number = 1,
volume = 231,
place = {United States},
year = {Wed Feb 12 00:00:00 EST 2014},
month = {Wed Feb 12 00:00:00 EST 2014}
}