title: Effects of low concentration biodiesel blends application on modern passenger cars. Part 2: impact on carbonyl compound emissions.
abstract: Today in most European member states diesel contains up to 5% vol biodiesel. Since blending is expected to increase to 10% vol, the question arises, how this higher mixing ratio will affect tailpipe emissions particularly those linked to adverse health effects. This paper focuses on the impact of biodiesel on carbonyl compound emissions, attempting also to identify possible relationship between biodiesel feedstock and emissions. The blends were produced from five different feedstocks, commonly used in Europe. Measurements were conducted on a Euro 3 common-rail passenger car over various driving cycles. Results indicate that generally the use of biodiesel at low concentrations has a minor effect on carbonyl compound emissions. However, certain biodiesels resulted in significant increases while others led to decreases. Biodiesels associated with increases were those derived from rapeseed oil (approx. 200%) and palm oil (approx. 180%), with the highest average increases observed at formaldehyde and acroleine/acetone.
authors.affiliation: Laboratory of Applied Thermodynamics, Aristotle University Thessaloniki, PO Box 458, GR 54124 Thessaloniki, Greece.
authors.forename: Georgios
authors.initials: G
authors.lastname: Fontaras
authors.forename: Georgios
authors.initials: G
authors.lastname: Karavalakis
authors.forename: Marina
authors.initials: M
authors.lastname: Kousoulidou
authors.forename: Leonidas
authors.initials: L
authors.lastname: Ntziachristos
authors.forename: Evangelos
authors.initials: E
authors.lastname: Bakeas
authors.forename: Stamoulis
authors.initials: S
authors.lastname: Stournas
authors.forename: Zissis
authors.initials: Z
authors.lastname: Samaras
mesh_terms: D056804:Biofuels; D004784:Environmental Monitoring; D005229:Fatty Acids, Monounsaturated; D000073878:Palm Oil; D010938:Plant Oils / Q000737:chemistry; D000074262:Rapeseed Oil; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D056804:Biofuels; D005229:Fatty Acids, Monounsaturated; D010938:Plant Oils; D000074262:Rapeseed Oil; D001335:Vehicle Emissions; D000073878:Palm Oil