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International Journal of Chemical Engineering
Volume 2017, Article ID 1409495, 12 pages
Research Article

Study on Carbonyl Emissions of Diesel Engine Fueled with Biodiesel

1School of Automobile and Traffic Engineer, Jiangsu University, Zhenjiang 212013, China
2Changshu Institute of Technology, Suzhou 215500, China

Correspondence should be addressed to Ruina Li; moc.621@6070aniuril

Received 30 November 2016; Revised 24 January 2017; Accepted 13 February 2017; Published 20 March 2017

Academic Editor: Sankar Chakma

Copyright © 2017 Ruina Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Biodiesel is a kind of high-quality alternative fuel of diesel engine. In this study, biodiesel and biodiesel/diesel blend were used in a single cylinder diesel engine to study the carbonyl emissions. The result shows that carbonyl pollutants of biodiesel and biodiesel/diesel blend are mainly aldehyde and ketone compounds with 1–3 carbon atoms, and formaldehyde concentration is higher than 80% of the total carbonyl pollutants for biodiesel. The formaldehyde concentration peak is reduced with the increase of intake temperature (), intake pressure (), and exhaust gas recirculation (EGR) ratio and increased with the increase of compression ratio (). When excess air coefficient () is lower than 1.7, the formaldehyde concentration is increased with the increase of excess air ratio. When is higher than 1.7, the formaldehyde concentration is reduced with the increase of excess air ratio. The dilution of air can reduce formaldehyde concentration in the premixed flame of diesel effectively; however, it has less effect on biodiesel. Among the fuel pretreatment measures of adding hydrogen, CO, and methane, the addition of hydrogen shows the best effect on reducing formaldehyde of biodiesel.