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Journal of Combustion
Volume 2018, Article ID 4819175, 9 pages
Research Article

Emission Performance of a Diesel Engine Fuelled with Petrol Diesel, Green Diesel, and Waste Cooking Oil Blends

Engineering Department, Roma Tre University, 00146 Rome, Italy

Correspondence should be addressed to O. Chiavola; ti.3amorinu@alovaihc.allenro

Received 31 January 2018; Revised 6 April 2018; Accepted 16 April 2018; Published 9 May 2018

Academic Editor: Constantine D. Rakopoulos

Copyright © 2018 O. Chiavola and E. Recco. 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.


The purpose of this paper is to conduct an experimental research on the impact of mixing ratio of biodiesel from waste cooking oil and an innovative diesel fuel (in which a renewable component is contained) on the emissions of an up-to-date light and compact small engine that has a leading role in city cars and urban vehicles. Two blends’ mixing ratios (20% and 40% by volume) were tested and the results were compared to those obtained when the engine was operated with low sulfur diesel (ULSD) and ULSD blended with 15% by volume of renewable diesel. The results indicate that diesel+ enhances CO and HC emissions in the exhaust as regards ULSD. Blending diesel+ with WCO causes a further reduction for most of the engine operative field. Concerning particulate emission, accumulation mode dominates for all fuels. Diesel+ is always characterized by lower mean diameters as regards ULSD. The addition of WCO further reduces the court mean diameter. Particle number concentration obtained by fuelling the engine with B40 is the lowest as regards all the other tested fuels. Concerning , a moderate increase of the emission was observed when fuelling the engine with diesel+, net or in blends.