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On-Board Hydrogen Generation for Rapid Catalyst Light-Off
Technical Paper
2000-01-1841
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes an on-vehicle demonstration of a hydrogen-heated catalyst (HHC) system for reducing the level of cold-start hydrocarbon emissions from a gasoline-fueled light-duty vehicle. The HHC system incorporated an onboard electrolyzer that generates and stores hydrogen (H2) during routine vehicle operation. Stored hydrogen and supplemental air are injected upstream of a platinum-containing automotive catalyst when the engine is started. Rapid heating of the catalytic converter occurs immediately as a result of catalytic oxidation of hydrogen (H2) with oxygen (O2) on the catalyst surface.
Federal Test Procedure (FTP) emission results of the hydrogen-heated catalyst-equipped vehicle demonstrated reductions of hydrocarbons (HC) and carbon monoxide (CO) up to 68 and 62 percent, respectively. This study includes a brief analysis of the emissions and fuel economy effects of a 10-minute period of hydrogen generation during the FTP. Preliminary data suggests that further improvements in emissions performance and fuel efficiency can be obtained by additional HHC system integration by engine calibration and control.
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Citation
Heimrich, M. and Andrews, C., "On-Board Hydrogen Generation for Rapid Catalyst Light-Off," SAE Technical Paper 2000-01-1841, 2000, https://doi.org/10.4271/2000-01-1841.Also In
References
- Murphy, O.J. Kukreja, R.T. Johnson, J.L. Cisar, A.J. Hodko, D. Hitchens G.D. “Improved Method of Heating Catalytic Converters of Vehicles to Attain Ultra-Low Emissions” Environmental Protection Agency March 31 1994
- Andrews, C.C. Durai, R. Chepin, J.F. Murphy O.J. “Improved Method of Heating Catalytic Converters of Vehicles to Attain Ultra-Low Emissions” Environmental Protection Agency May 31 1996
- Kanada, Y. Hayasi, M. Akaki, M. Tsuchikawa, Isomura, A. “Hydrogen Added After-Burner System” SAE Paper 960346 1996
- Heimrich, M.J. “Demonstration of a Chemically Heated Catalyst on a Light-Duty Vehicle” Lynntech, Inc. May 23 1996
- Code of Federal Regulations, Title 40, Chapter 1, Part 86, Subpart B Sections applicable to light-duty vehicles