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FACT SHEET: E10 & AIR QUALITY

June 26, 2018

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- NOx reduced by up to 34%

- Particulate matter reduced by up to 95%

- Nanoparticles reduced by up to 96%

- Non-methane hydrocarbons reduced by up to 60%

- Benzene and butadiene reduced by around 25%

- Reduction in the cancer risk of a petrol blend by 6.6%

- Petrol blends lower NOx ten-fold compared to diesel

- Oxygen within ethanol leads to more efficient fuel burn

 

  • A recent study used by the EU Commission to evaluate the air quality impacts of biofuels showed NOx to be

    reduced by 34% and non-methane hydrocarbons by 60% when moving from E5 to E10, with E85 offering even further improvements.

  • A study from the University of Melbourne showed that E10 resulted in 18% less NOx, 15% lower hydrocarbons and 26% lower particulates than standard unleaded petrol.  

  • A study in Sao Paulo, which has 7m vehicles and the world’s largest gasoline/ethanol flexible-fuel fleet, showed that when motorists used higher levels of ethanol due to lower prices, emissions of dangerous lung-damaging particulates decreased. When ethanol prices increased and drivers used higher levels of gasoline instead, the concentration of nanoparticles increased by 30%. This is the only study to have been done in non-laboratory conditions and shows a clear correlation of ethanol lowering particulates.

  • A Swiss Federal Laboratories study showed that particulate matter emissions from E10 reduced by more than 95% compared to petrol, whilst another MIT study found that they were at least three times lower 

  • The same Swiss study showed that E10 lowered dangerous PAH nanoparticles by up to 96%

  • The recent study used by the EU Commission to evaluate the air quality impacts of biofuels illustrated particulate matter to be reduced by around 7% when moving from E5 to E10.  

  • Benzene and Butadiene emissions, both of which are highly carcinogenic, decrease by around 25% with higher levels of ethanol blending in fuel

  • The use of E10 is widely documented as achieving at least a 25% reduction in carbon monoxide emissions

  • Ethanol is not carcinogenic, whilst several chemicals contained within petrol are, so bioethanol blending helps to reduce the carcinogens within the fuel

  • A 5% increase in ethanol blending has shown to reduce the overall cancer risk of a petrol blend by 6.6%

  • Bioethanol is mixed with petrol only, which produces over ten times less NOx pollutants than diesel when tested in real-world conditions

  • The oxygen contained within ethanol helps the fuel to burn better and increases the efficiency of the engine, lowering the hydrocarbons that are released

  • In its recent report on Improving Air Quality, the DEFRA Select Committee stated that “the Government needs to develop more holistic policies that recognise CO2 reduction and air quality as inter-related issues requiring a joined-up response”

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