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Diesel Combustion Characteristics of Coconut Oil Ester Fuels
Technical Paper
2014-32-0084
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In order to improve the cold flow properties of coconut oil biodiesel and to reduce the lifecycle CO2 emission by using bio-alcohol at biodiesel manufacturing, varying the types of alcohol used at transesterification was examined. The pour point of coconut oil ester decreases as the carbon number of alcohol increases. Among 5 ester fuels, the pour point of coconut oil isobutyl ester (CiBE) made from isobutanol is lowest, −12.5 °C, compared to that of coconut oil methyl ester (CME), highest, −5 °C. The pour point of coconut oil 1-butyl ester (CBE) is −10 °C, second lowest. Furthermore, CBE, CiBE, CME and JIS No.2 diesel fuel (gas oil) were tested using a DI diesel engine. CBE and CiBE have shorter ignition delay compared to the gas oil although slightly longer than CME. CBE and CiBE have the same thermal efficiency and NOx emissions compared to the gas oil. HC, CO and Smoke emissions of coconut oil ester fuels slightly increase when the ester molecule carbon number increases. However, these exhaust emissions are lower than that of the gas oil. From the experimental results, it is concluded that CBE and CiBE are good alternative diesel fuels.
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Citation
Kinoshita, E., Itakura, A., Otaka, T., Koide, K. et al., "Diesel Combustion Characteristics of Coconut Oil Ester Fuels," SAE Technical Paper 2014-32-0084, 2014, https://doi.org/10.4271/2014-32-0084.Also In
References
- U.S. Department of Energy 2006 Biodiesel Handling and Use Guidelines Third 2006 1 69
- Sheehan , J. , Camobreco , V. , Duffield , J. , Graboski , M. , Shapouri , H. An Overview of Biodiesel and Petroleum Diesel Life Cycles NREL/TP-580-24772 1998 1 47
- Kinoshita , E. , Myo , T. , Hamasaki , K. , Tajima , H. et al. Diesel Combustion Characteristics of Coconut Oil and Palm Oil Biodiesels SAE Technical Paper 2006-01-3251 2006 10.4271/2006-01-3251
- Kinoshita , E. , Fushimi , K. , and Yoshimoto , Y. Combustion Characteristics of a DI Diesel Engine with Short and Medium Chain Saturated Fatty Acid Methyl Esters 2013
- Crabbe , E. , Nolasco-Hipolito , C. , Kobayashi , G. , Sonomoto , K. , Ishizaki , A. Biodiesel production from crude palm oil and evaluation of butanol extraction and fuel properties Process Biochemistry 37 2001 65 71
- Kinoshita , E. , Ueda , Y. , and Takata , S. Combustion Characteristics of a DI Diesel Engine with Palm Oil Butyl and Isobutyl Esters SAE Technical Paper 2011-01-1937 2011 10.4271/2011-01-1937
- Japan Oil Chemists' Society Standard Methods for the Analysis of Fats, Oils and Related Materials 1996
- Knothe , G. Dependence of biodiesel fuel properties on the structure of fatty acid alkyl esters Fuel Processing Technology 86 2005 1059 1070
- Tat , M.E. and Gerpen , J.H. Van Measurement of Biodiesel Speed of Sound and Its Impact on Injection Timing NREL/SR-510-31462 2003 1 115
- Mizushima , N. , Arai , H. , Iwasa , K. , Kawano , D. , Ishii , H. , Goto , Y. A Study on the Improvement of NOx Emission Performance in a Diesel Engine Fuelled with Biodiesel (1st Report) Proceedings of 2010 Society of Automotive Engineers of Japan Annual Congress (Autumn), No.148-10 2011 13 18