This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Characteristics of Combustion and Emissions in a DI Engine Fueled with Biodiesel Blends from Soybean Oil
Technical Paper
2008-01-1832
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Combustion and emission characteristics of diesel and biodiesel blends (soybean methyl ester) were studied in a single-cylinder Direct Injection (DI) engine at different loads and a constant speed. The results show that NOx emission and fuel consumption are increased with increasing biodiesel percentage. Reduction of smoke opacity is significant at higher loads with a higher biodiesel ratio. Compared with the baseline diesel fuel, B20 (20% biodiesel) has a slight increase of NOx emission and similar fuel consumption. Smoke emission of B20 is close to that of diesel fuel. Results of combustion analysis indicate that start of combustion (SOC) for biodiesel blends is earlier than that for diesel. Higher biodiesel percentage results in earlier SOC. Earlier SOC for biodiesel blends is due to advanced injection timing from higher density and bulk modulus and lower ignition delay from higher cetane number. Peak of heat release rate (PHRR) of biodiesel blends is further decreased with increasing the biodiesel percentage, which is due to poor evaporation and atomization characteristics of biodiesel blends and lower ignition delay from higher CN (Cetane Number). Additionally, hot Exhaust Gas Recirculation (EGR) will significantly decrease the NOx emission for diesel and biodiesel blends. NOx emission of pure biodiesel is lower than baseline of diesel at about 10% EGR rate. However, EGR rates have little influence on the peak of heat release rate for pure biodiesel.
Recommended Content
Authors
Topic
Citation
Zhang, X., Gao, G., Li, L., Wu, Z. et al., "Characteristics of Combustion and Emissions in a DI Engine Fueled with Biodiesel Blends from Soybean Oil," SAE Technical Paper 2008-01-1832, 2008, https://doi.org/10.4271/2008-01-1832.Also In
References
- Statistical Review of World Energy 2006 - - Oil section 2006 BP report http://www.BP.com
- Commonlyasked.pdf. NBB report http://www.nbb.org
- Alfuso Salvatore Auriemma Maddalena Police Giuseppe Prati Maria Vittoria The effect of methylester of rapeseed oil on combustion and emissions of DI diesel engines SAE paper 932801 1993
- Marshall William Schumacher Leon G. Howell Steve Engine exhaust emissions evaluation of a Cummins L10E when fueled with a biodiesel blend SAE paper 952363 1995
- Zhang Yu Van Gerpen Jon H. Combustion analysis of esters of soybean oil in a diesel engine SAE Paper 960765
- Monyem, A. van Gerpen, J. Canakci, M. “The Effect of Timing and Oxidation on Emissions from Biodiesel-Fueled Engines” Trans. of the Am. Soc. of Agricultural Engineers 44 35 2001
- Krahl Jürgen et al. Influence of Biodiesel and Different Designed Diesel Fuels on the Exhaust Gas Emissions and Health Effects SAE paper 2003-01-3199 2003
- Senatore A. Cardone M. Allocca L. Vitolo S. Experimental Characterization of a Common Rail Engine Fuelled with Different Biodiesel SAE Paper 2005-01-2207
- Environmental Protection Agency October 2002 Draft Technical Report A Comprehensive Analysis of Biodiesel Impacts on Exhaust Emissions
- Scholl Kyle W. et al. Combustion of Soybean Oil Methyl Ester in a Direct Injection Diesel Engine SAE paper 930934 1993
- Xiaoming Lu Yunshan Ge et al. An Experimental Investigation on Combustion and Emissions Characteristics of Turbocharged DI Engines Fueled with Blends of Biodiesel SAE Paper 2005-01-2199 2003
- Zheng Ming Reader Graham T. Hawley J. Gary Diesel engine exhaust gas recirculation - - a review on advanced and novel concepts Energy Conversion and Management 45 2004 883 900
- Tat, M. van Gerpen, J. “Measurement of Biodiesel Speed of Sound and Its Impact on Injection Timing” National Renewable Energy Laboratory, NREL/SR-510-31462 February 2003
- Allen C. A. W. Watts K. C. Comparative analysis of the atomization characteristics of fifteen biodiesel fuel types [J] Transactions of the ASAE 2000 43 2 207 211