The impact of soy-based biodiesel on PAH, nitro-PAH and oxy-PAH emissions from a passenger car operated over regulated and nonregulated driving cycles |
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| Authors: | George Karavalakis George Deves Georgios Fontaras Stamoulis Stournas Zissis Samaras Evangelos Bakeas |
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| Affiliation: | aLaboratory of Fuels Technology and Lubricants, School of Chemical Engineering, National Technical University of Athens, Greece;bLaboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Greece;cLaboratory of Applied Thermodynamics, Department of Mechanical Engineering, Aristotle University, Thessaloniki, Greece |
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| Abstract: | This study explores the impact of neat soy-based methyl ester and its 50% v/v blend with low sulphur automotive diesel on PAH, nitro-PAH and oxy-PAH emissions of a Euro 2 compliant diesel passenger car tested on a chassis dynamometer. Emission measurements were evaluated for the certification NEDC, a hot-start UDC (urban part of NEDC) and the non-legislated Artemis driving cycles which simulate urban, rural and highway driving conditions in Europe. Overall, 16 PAHs, 4 nitro-PAHs and 6 oxy-PAHs were determined in the exhaust. The results obtained, showed that PAH emissions decreased with the addition of biodiesel during all driving modes. However, their nitrated and oxygenated products were found to increase with biodiesel compared to diesel fuel. The use of pure biodiesel led in some increases in PAH emissions when compared to its 50% blend. PAH emissions were also found to be adversely influenced by cold-start conditions and certain fuel properties. |
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| Keywords: | Biodiesel Exhaust emissions Vehicle PAHs, oxygenated PAH Driving cycles |
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