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Analysis of Plasma-Catalysis for Diesel NOx Remediation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 19, 1998 by SAE International in United States
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A dielectric barrier discharge device has been built to test nonthermal plasma discharges for simulated diesel exhaust NOx removal. The device has also been tested with selected catalysts located after the plasma. Emissions are measured by conventional automotive emission analyzers, plus FTIR.
Dielectric barrier discharges without catalyst convert input NO to a mix of NO2, HONO, HNO3, and organic nitrates. At 30 J/l energy deposition, approximately 26% of the input NO is “lost”. Some of the hydrocarbon input is converted to a variety of species, including CO, CO2, aldehydes, and alcohols.
A Cu-ZSM catalyst after the plasma device eliminates the apparent NOx conversion seen with the bare plasma. This indicates that the apparent NOx conversion of the bare plasma is actually conversion to some (unmeasured) species which can be reconverted to NOx by the Cu-ZSM catalyst.
Placing a proprietary catalyst within the plasma results in significant NOx conversion. In this case, 56% of the input NO is not found in measured species after the plasma-catalyst system. Remaining NOx is primarily NO. A Cu-ZSM catalyst after this system does not degrade NOx efficiency.
Chemiluminescent NOx analyzers will measure significantly lower NOx conversion than the true value when formaldehyde is present.
CitationHoard, J. and Balmer, M., "Analysis of Plasma-Catalysis for Diesel NOx Remediation," SAE Technical Paper 982429, 1998, https://doi.org/10.4271/982429.
SAE 1998 Transactions - Journal of Fuels and Lubricants
Number: V107-4; Published: 1999-09-15
Number: V107-4; Published: 1999-09-15
- “NO x Reduction by Compact Electron Beam Processing” Penetrante B.M. Hsaio M.C. Merritt B.T. Wallman P.H. Vogtlin G.E. Lawrence Livermore National Laboratory 1995 DOE Diesel Emission Reduction Workshop
- “Nitrogen Oxides Removal Using Discharge Plasma” Shimizu Tsunoda Kinoshita Nagihara Katsura Mizuno Toyohashi University 33rd Jp Heat Cond. Symposium Trans. 109 110
- “Non-Thermal Plasma Exhaust Aftertreatment: A Fast Rise-Time Concept” Whealton Hanson Storey Radison Graves Bigelow Armfield SAE Paper 971718 May 1997
- “Fundamental Limits on NO x Reduction by Plasma” Penetrante Hsaio Merritt Vogtlin SAE Paper 971715 May 1997
- “Vehicle Exhaust Treatment Using Electrical Discharge Methods” Tonkyn Barlow Balmer Orlando Hoard Goulette SAE Paper 971716 May 1997
- “Removal of NO x Contained in Combustion Exhaust Gas by N 2 Plasma Injection” Morimune Ejiri Kuroki Tokyo Metropolitan University JSAE Conference Proceedings 911 1991-5 179 182
- “Simultaneous Reduction of Particulate and NO x Using a Plasma” Fannick Bykowski Southwest Research Institute SAE Paper 942070 October 1994 “Quick Look Program for Diesel Particulate Removal with a Plasma” SWRI Report 9744 April 1993
- “Plasma Assisted Heterogenous Catalysis for NO x Reduction in Lean-Burn Engine Exhausts” Penetrante Bernie Presentation to the DOE Diesel Engine Emission Reduction Workshop July 1997
- “FTIR: Fundamentals and applications in the analysis of dilute vehicle exhaust” Gierczak C. A. Andino J. M. Butler J. W. Heiser G. A. Jession G. Korniski T. J. SPIE - The international Society for Optical Engineering 1433 Measurement of Atmospheric Gases 1991 315
- “Investigation of Analyzer Problems in the Measurement of NOx from Methanol Vehicles” Gabele Peter A. EPA report number PB89-124374 November 1988
- “The Pulse Flame Combustor Revisited” Hepburn J. Dobson D. Hubbard C. Otto K. SAE Paper 962118 October 1996
- “Diesel NOx Reduction on Surfaces in Plasma” SAE Paper 982511 October 1998 Balmer M. Lou Tonkyn Russell Hoard John