This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Improvement of HC-SCR Performance by Fuel Reforming Using a Low Temperature Oxidation
Technical Paper
2021-01-0591
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
A fuel reforming technology using a low temperature oxidation was developed to improve a NOx reduction performance of HC-SCR (Hydrocarbons Selective Catalytic Reduction) system, which does not require urea. The low-temperature oxidization of a diesel fuel in gas phase produces NOx reduction agents with high NOx reduction ability such as aldehydes and ketones. A pre-evaporation-premixing-type reformer was adopted in order to generate a uniform temperature field and a uniform fuel/air premixed gas, and to promote the low temperature oxidation efficiently. As a fundamental study, elementary reaction analysis for n-hexadecane/air premixtures was carried out to investigate the suitable reformer temperature and fuel/air equivalence ratio for generation of oxygenated hydrocarbons. It was found that the reforming efficiency was highest at the reforming temperature around 623 to 673K, and aldehydes and ketones were produced. It was inferred that the NOx reduction performance by the reformed fuel was higher than diesel fuel itself. The FTIR measurements of reformed-fuel-vapor composition and the experiments of NOx reduction in the catalyst temperature range of 473 K to 773 K were performed for n-hexadecane and diesel fuel using the developed reformer. A Ag/Al2O3 catalyst was used as the NOx reduction catalyst. As a result of composition analysis, it was confirmed that low-temperature oxidization of hydrocarbons occurred in the reformer as estimated by the elementary reaction analysis. The NOx reduction efficiency by reformed diesel fuel vapor was up to about 90%. Improvements of the efficiency of diesel fuel reforming and the NOx reduction performance in wide range of the catalyst temperature are challenges.
Recommended Content
Authors
Topic
Citation
Saito, I., Sato, S., Nomura, H., Suganuma, Y. et al., "Improvement of HC-SCR Performance by Fuel Reforming Using a Low Temperature Oxidation," SAE Technical Paper 2021-01-0591, 2021, https://doi.org/10.4271/2021-01-0591.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Shoji , A. et al. Development of a Simultaneous Reduction System of NOx and PM for Light-Duty Truck Proceedings of JSAE Annual Congress, 20035567 2004
- Kondo , N. et al. Development of Lean NOx Trap System for Commercial Vehicle (Second Report)-Application to Multi Cylinder Engine and Development Issue Proceedings of JSAE Annual Congress, 20045121 2010
- Sato , S. et al. The Study of NOx Reduction Using Urea-SCR System for a Heavy-Duty Diesel Engine Proceedings of JSAE Annual Congress, 20045146 2004
- Hiranuma , S. et al. Aftertreatment System for Commercial Diesel Engine (First Report)-Basic System Layout using NOx Catalyst and DPF Proceedings of JSAE Annual Congress, 20085359 2008
- Lambert , C. et al. Critical Materials in Catalysis: Precious vs Base Metals in Automotive Catalyst Systems 2001 DEER Conference Oct. 3- 6 2011
- Kowada , M. et al. Development of PM and NOx Reduction After-treatment System for Heavy-Duty Commercial Vehicle Proceedings of JSAE Annual Congress, 20105725 2010
- Sato , S. et al. Improvement of NOx Reduction Performance for Urea-SCR System Focus on Low Temperature Proceedings of JSAE Annual Congress, 20175180 2017
- Iwamoto , M. Selective Reaction of NO by Lower Hydrocarbons in the Presence of O2 and SO2 over Copper Ion-Exchanged Zeolite Catalysts 32 6 430 1990
- Hisatomi , K. et al. Development of New Diesel Engine for Medium Duty Commercial Vehicle Met Post New Long-Term Exhaust Emission Regulations Without the Urea-SCR Proceedings of JSAE Annual Congress, 20115682 2010
- Hirabayashi , H. , Furukawa , T. , Koizumi , W. , Koyanagi , Y. et al. Development of New Diesel Particulate Active Reduction System for Both NOx and PM Reduction SAE Technical Paper 2011-01-1277 2011 https://doi.org/10.4271/2011-01-1277
- Hayashizaki , K. et al. After-Treatment System of Medium Duty Engines Using Diesel Fuel as a Reducing Agent for NOx Reduction SAE Technical Paper 2018-01-0345 2018 https://doi.org/10.4271/2018-01-0345
- Shimizu , K. , Tsuzuki , M. , and Satsuma , A. Effects of Hydrogen and Oxygenated Hydrocarbons on the Activity and SO2-Tolerance of Ag/Al2O3 for Selective Reduction of NO Applied Catalysis B: Environmental 71 1 2 80 84 2007
- Wang , Z. , Zhang , L. , Moshammer , K. , Popolan-Vaida , D.M. et al. Additional Chain-Branching Pathways in the Low-Temperature Oxidation of Branched Alkanes Combustion and Flame 164 386 396 2016
- Tanabe , M. , Kono , M. , Sato , J. , Koenig , J. et al. Two Stage Ignition of n-Heptane Isolated Droplets Combust. Sci. Technol. 108 1 3 103 119 1995
- Nayagam , V. , Dietrich , D.L. , Hicks , M.C. , and Williams , F.A. Cool-Flame Extinction during n-Alkane Droplet Combustion in Microgravity Combustion and Flame 162 2140 2147 2015
- Wan , S. , Fan , Y. , Maruta , K. , and Suzuki , Y. Wall Chemical Effect of Metal Surfaces on DME/Air Cool Flame in a Micro Flow Reactor Proc. Combust. Inst. 37 5655 5662 2019
- Reuter , C.B. , Won , S.H. , and Ju , Y. Flame Structure and Ignition Limit of Partially Premixed Cool Flames in a Counterflow Burner Proc. Combust. Inst. 36 1513 1522 2017
- Westbrook , C.K. , Pitz , W.J. , Herbinet , O. , Curran , H.J. , and Silke , E.J. A Detailed Chemical Kinetic Reaction Mechanism for n-Alkane Hydrocarbons from n-Octane to n-Hexadecane Combust. Flame 156 1 181 199 2009 http://dx.doi.org/10.1016/j.combustflame.2008.07.014 LLNL-JRNL-401196