Role of Cerium Oxide Nanoparticles as Diesel Additives in Combustion Efficiency Improvements and Emission Reduction
Publication: Journal of Energy Engineering
Volume 142, Issue 4
Abstract
An experimental investigation is conducted to evaluate the performance, combustion, and emission characteristics of a diesel engine using cerium oxide () nanoparticles as diesel fuel additives. Using cetyl trimethyl ammonium bromide (CTAB) as the cationic surfactant and with ultrasonic vibration, nanoparticles at dosing levels of 50 and can be stably and uniformly dispersed in diesel. Physically, the mixing of fuel blends with air is enhanced by microexplosion events because of the large surface-volume ratio and intensified thermal transmissibility of nanoparticles. Moreover, chemically, in diesel fuel plays a positive role in the dehydrogenation reaction at a high temperature because of its excellent redox ability. As a result, the addition of to neat diesel (50 and ) leads to a gradual increase in the cylinder pressure compared with the reference neat diesel. Meanwhile, the ignition of fuel blends with a high dosing level of occurs earlier by approximately 1.2° crank angle (CA) and 1.8°CA, respectively. At full load, the effective thermal efficiencies for fuels are augmented by approximately 1.7 and 2.3%. Because of the distinctive merits of in promoting fuel atomization and its favorable intrinsic catalytic effect, the level of harmful pollutants (such as HC, CO, , and soot) in exhaust gases is appreciably reduced to varying degrees.
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Acknowledgments
The authors wish to express their appreciation for the funds from the National Natural Science Foundation of China (No. 51376083 and No. 51376095) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), which supported this study.
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Published In
Journal of Energy Engineering
Volume 142 • Issue 4 • December 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Feb 2, 2015
Accepted: Sep 16, 2015
Published online: Dec 16, 2015
Discussion open until: May 16, 2016
Published in print: Dec 1, 2016
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