Selective Catalytic Reduction of Diesel Engine Nox Emissions Using Ethanol as a Reductant

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NOx emissions from a heavy-duty diesel engine were reduced by more than 90% and 80% utilizing a full-scale ethanol-SCR system for space velocities of 21000/h and 57000/h respectively. These results were achieved for catalyst temperatures between 360 and 400 C and for C1:NOx ratios of 4-6. The SCR process appears to rapidly convert ethanol to acetaldehyde, which subsequently slipped past the catalyst at appreciable levels at a space velocity of 57000/h. Ammonia and N2O were produced during conversion; the concentrations of each were higher for the low space velocity condition. However, the concentration of N2O did not exceed 10 ppm. ... continued below

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8 pages

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Kass, M. D.; Thomas, J. F.; Lewis, S. A., Sr.; Storey, J. M.; Domingo, N. & Graves, R. L. August 24, 2003.

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NOx emissions from a heavy-duty diesel engine were reduced by more than 90% and 80% utilizing a full-scale ethanol-SCR system for space velocities of 21000/h and 57000/h respectively. These results were achieved for catalyst temperatures between 360 and 400 C and for C1:NOx ratios of 4-6. The SCR process appears to rapidly convert ethanol to acetaldehyde, which subsequently slipped past the catalyst at appreciable levels at a space velocity of 57000/h. Ammonia and N2O were produced during conversion; the concentrations of each were higher for the low space velocity condition. However, the concentration of N2O did not exceed 10 ppm. In contrast to other catalyst technologies, NOx reduction appeared to be enhanced by initial catalyst aging, with the presumed mechanism being sulfate accumulation within the catalyst. A concept for utilizing ethanol (distilled from an E-diesel fuel) as the SCR reductant was demonstrated.

Physical Description

8 pages

Notes

OSTI as DE00829853

Source

  • 9th Diesel Engine Emissions Reduction (DEER) Workshop 2003, Newport, RI (US), 08/24/2003--08/28/2003; Other Information: Fuel-Borne Reductants for NOx Aftertreatment

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  • Report No.: CONF-200308--136
  • Office of Scientific & Technical Information Report Number: 829853
  • Archival Resource Key: ark:/67531/metadc781356

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 24, 2003

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  • Dec. 3, 2015, 9:30 a.m.

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  • March 16, 2018, 12:21 p.m.

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Kass, M. D.; Thomas, J. F.; Lewis, S. A., Sr.; Storey, J. M.; Domingo, N. & Graves, R. L. Selective Catalytic Reduction of Diesel Engine Nox Emissions Using Ethanol as a Reductant, article, August 24, 2003; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc781356/: accessed April 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.