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Near-Zero NOx Control for Diesel Aftertreatment
Technical Paper
1999-01-2890
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A two-chamber catalyst system for the aftertreatment of No. 2 Diesel exhaust is demonstrated. NOx conversion efficiencies greater than 95% were obtained over a broad range of operating temperatures and NOx levels. The system incorporates a NOx catalyst (SCONOx™) for the removal of CO, hydrocarbons, and NOx from the exhaust stream and a SO2 catalyst (SCOSOx™) for the protection of the NOx catalyst from sulfur poisoning. Both catalysts are of sorbate or “trap” type. Hydrogen is used as the reductant and can be supplied by on-board fuel reformers. Tests of the catalysts were performed with various loads, temperatures, and NOx levels. A light-duty diesel engine with no particulate control was used for the tests. All tests were conducted using No. 2 Diesel fuel.
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Parks, J., Wagner, G., Epling, W., Sanders, M. et al., "Near-Zero NOx Control for Diesel Aftertreatment," SAE Technical Paper 1999-01-2890, 1999, https://doi.org/10.4271/1999-01-2890.Also In
References
- Luders H. Stommel P. Geckler S. “Diesel Exhaust Aftertreatment - New Approaches to Ultra Low Emission Diesel Vehicles” SAE 1999-01-0108
- Dearth M. A. Hepburn J. S. Thanasiu E. McKenzie J. Horne G. S. “Sulfur Interaction with Lean NOx Traps: Laboratory and Engine Dynamometer Studies” SAE 982595 1998