Combustion and Emissions of a Common-Rail Diesel Engine Fueled with HWCO
Publication: Journal of Energy Engineering
Volume 140, Issue 3
Abstract
Hydrotreated vegetable or waste cooking oils (HVOs or HWCOs) are considered second-generation biofuels and are regarded as a promising alternative to current market diesel because they mainly consist of paraffinic hydrocarbons. This paper presents an experimental investigation conducted in order to examine the potential of HWCO as a substitute of diesel fuel. The HWCO used was produced from waste cooking oils through a catalytic hydrotreatment process. The main target of the study was the investigation of the emissions and combustion characteristics of the HWCO in comparison with conventional diesel. To that aim, a light-duty common-rail Euro 5 diesel engine, running on neat HWCO, was tested over the New European Driving Cycle (NEDC) at the engine test bed. The results showed lower , CO, and hydrocarbon emissions, but increased emissions. Combustion analysis, performed at specific steady-state operating points, revealed the differences in the combustion mechanism between HWCO and market diesel, forming a basis for the interpretation of emissions results.
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Acknowledgments
The authors wish to express their appreciation for the financial support provided by the program LIFE+ of the European Commission, which funded 50% the Environmental Policy and Governance project LIFE08 ENV/GR/000569. The authors would also like to thank Dr. Panayotis Pistikopoulos and Dr. Dimitris Katsaounis for assisting in the experimental part of this work.
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Published In
Journal of Energy Engineering
Volume 140 • Issue 3 • September 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: May 13, 2013
Accepted: Jul 25, 2013
Published online: Jul 27, 2013
Discussion open until: May 27, 2014
Published in print: Sep 1, 2014
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