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Diesel NOx Reduction on Surfaces in Plasma
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 19, 1998 by SAE International in United States
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Recent work has shown that energy efficiencies as well as yields and selectivities of the NOx reduction reaction can be enhanced by combining a plasma discharge with select catalysts. While analysis of gas phase species with a chemiluminescent NOx meter and mass spectrometer show that significant removal of NOx is achieved, high background concentrations of nitrogen preclude the measurement of nitrogen produced from NOx reduction. Results presented in this paper show that N2 from NOx reduction can be measured if background N2 is replaced with helium. Nitrogen production results are presented for a catalyst system where the catalyst is in the plasma region and where the catalyst is downstream from the plasma. The amount of N2 produced is compared with the amount of NOx removed as measured by the chemiluminescent NOx meter. The measured nitrogen from NOx reduction accounts for at least 40% of the total NOx removed for both reactor configurations. FTIR analysis for by-product species including N2O, HONO, HNO3, NO2, and CH3ONO2 does not account for the “missing” NOx.
- M. Lou Balmer - Pacific Northwest National Laboratory
- Russ Tonkyn - Pacific Northwest National Laboratory
- Andy Kim - Pacific Northwest National Laboratory
- Steven Yoon - Pacific Northwest National Laboratory
- Dan Jimenez - Pacific Northwest National Laboratory
- Thom Orlando - Pacific Northwest National Laboratory
- S. E. Barlow - Pacific Northwest National Laboratory
CitationBalmer, M., Tonkyn, R., Kim, A., Yoon, S. et al., "Diesel NOx Reduction on Surfaces in Plasma," SAE Technical Paper 982511, 1998, https://doi.org/10.4271/982511.
- “Fundamental Limits on NO x Reduction by Plasma,” Penetrante Hsaio Merritt Vogtlin SAE Paper 911715 May 1997
- “Vehicle Exhaust Treatment Using Electrical Discharge methods,” Tonkyn Barlow Balmer Orlando Hoard Goulette SAE Paper 971716 May 1997
- “Plasma-Assisted Heterogeneous Catalysis for NO x Reduction in Lean-Burn Engine Exhaust,” Penetrante Hsiao Merritt Vogtlin Proceedings of the 1997 Diesel Engine Emissions Reduction Workshop
- “Effect of Hydrocarbons on Plasma Treatment of Nox,” Penetrante Pitz Hsiao Merritt Vogtlin Proceedings of the 1997 Diesel Engine Emissions Reduction Workshop
- “Analysis of Plasma-Catalysis for Diesel NO x Remediation,” Hoard Balmer SAE meeting San Fracisco Oct. 1998