Ethanol-blend fuel cuts emissions

‘Currently, numerous commercially available petrol brands contain 10 per cent ethanol,’ said Brian Hilton, senior staff engineer at the centre and part of the research team.

‘There have been concerns raised that any increase in blend would negatively impact standard internal combustion engines, however our data shows that vehicle performance remained constant, while carbon monoxide and hydrocarbon emissions decreased, even over E10 blends.’

The RIT team, which was also led by Brian Duddy, a senior programme manager at the Center for Integrated Manufacturing Studies, worked with the County of Monroe in New York State to test the use of E20 in 10 older petrol vehicles that were not designed for ethanol-fuel mixtures.

The study used the county’s service vehicles, which logged more than 100,000 miles on E20 fuel and were analysed periodically both for emissions and overall wear and tear on the vehicle.

The fleet showed an average emissions reduction for carbon monoxide of 23 per cent, as well as a 13 per cent reduction for hydrocarbon emissions compared with conventional gasoline.