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Exhaust emissions from light duty vehicles running on petrol ethanol blends measured under laboratory conditions

Bielaczyc P., Woodburn J., Szczotka A.

Prace Naukowe Instytutu Nafty i Gazu

2015

nr 204

124--139

Ethanol is widely used in petrol-ethanol blends, including in the European Union. Since the fuel type has a great impact on emissions, blends of differing ethanol content can have a great impact on exhaust emissions. This paper presents a variety of data on regulated and unregulated exhaust emissions from European vehicles running on various petrol-ethanol blends tested under laboratory conditions at BOSMAL. Some fundamental phenomena are discussed and the reader is directed to sources of further information. Furthermore, some brief comparisons to other studies are made and general comments are made on emissions trends regarding petrol-ethanol blends.

The usage of bioethanol in light-duty SI vehicles - a brief overview

Bielaczyc P., Szczotka A., Woodburn J.

Silniki Spalinowe

2011

R. 50, nr 3

Ethanol produced from fermentation of biomass has been of interest as a potential partial replacement for petroleum in SI engines for some time. The oxygenated nature of the ethanol molecule can aid combustion and reduce production of partial combustion products (HC, CO). Ethanol can be splash blended with petrol to produce blends. Blends with up to 10 % ethanol can be used with few problems in all but the oldest vehicles; up to 15 % ethanol has recently been deemed safe for use in light duty vehicles produced with the last decade. The E85 blend (85 % ethanol) requires specially designed vehicles, which are becoming more common in certain markets. The main issues associated with the use of ethanol and its blends are its corrosivity, affinity to water and its lower stoichiometric ratio. Increases in emission of aldehydes and a slight increase in emission of oxides of nitrogen have also been reported, and concern has been raised over the potential of increased aldehyde emissions to form more ground-level ozone. The potential for an improvement in air quality, engine performance and fuel supply security and sustainability makes work on the production and usage of ethanol and its blends a multidisciplinary research priority.