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| SELECTIVE CATALYTIC REDUCTION OF DIESEL ENGINE NOX EMISSIONS USING ETHANOL AS A REDUCTANT SELECTIVE CATALYTIC REDUCTION OF DIESEL ENGINE NOX EMISSIONS USING ETHANOL AS A REDUCTANT Creator/Author (1)Kass, M ; Thomas, J ; Lewis, S ; Storey, J ; Domingo, N ; Graves, R (2) Panov, A Publication Date 2003 Aug 24 OSTI Identifier OSTI ID: 829853 Report Number(s) CONF-200308--136 Other Number(s) TRN: US200429%%32 Resource Type Conference Resource Relation Conference: 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; PBD: 24 Aug 2003 Research Org Oak Ridge National Lab., Oak Ridge, TN (US); Caterpillar, Inc. (US) Sponsoring Org USDOE Office of Energy Efficiency and Renewable Energy (EE) (US) Subject 33 ADVANCED PROPULSION SYSTEMS; ACETALDEHYDE; AGING; AMMONIA; CATALYSTS; DIESEL ENGINES; ETHANOL; SELECTIVE CATALYTIC REDUCTION; SULFATES; VELOCITY Description/Abstract 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. Country of Publication United States Language English Format Size: 8 pages; Format: Adobe PDF Document with Extractable Text Availability OSTI as DE00829853 System Entry Date 2004 Nov 22 Download as EndNote Return to Search Results Return to Original Search Page Top Comments Website Policies and Important Links Information Bridge • Energy Citations Database • E-print Network • R&D Accomplishments About OSTI Science.gov • USA.gov • USAJOBS • Grants • Regulations.gov Last Updated: 01/13/2007 Attachments ----------------  Ethanol.pdf (194KB - 2 downloads) | ||
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