refining life

Bioethanol basics

Bioethanol is an alternative to fossil fuels, and can be used as a blend in regular gasoline, as means of lowering the CO2 emissions from the transport sector.

There are several different kinds of bioethanol products:

  • ED95: Gasoline with a 95 % bioethanol blend and 5 % additives - used in busses and trucks with modified diesel engines.

  • E85: Gasoline with an 85 % bioethanol blend - used in cars with Flexi fuel engines.

  • E15: Gasoline with a 15 % bioethanol blend - used in regular cars.

  • E10: Gasoline with a 10 % bioethanol blend - used in regular cars.

  • Bioethanol for biochemical products.

Bioethanol is produced from biomass and is a clean-burning fuel. Through a fermenting process, the starch found in biomass is transformed into bioethanol.

Biomass is organic material made from plant photosynthesis with the sun as energy source.

I Brazil, the production of bioethanol is based on sugar cane, as opposed to the US, where it is based on maize, and Europe where it is based on corn, maize and sugar beets.

All gasoline in Denmark has since 2010 contained a blend of 5 % bioethanol, and most regular cars can easily drive on a 15 % blend.

Bioethanol has a higher octane number than gasoline and burns slower, which means that the engine gets a higher efficiency than when burning gasoline. However, bioethanol has a somewhat lower energy value, which means that consumption in volume is a bit higher than when using gasoline.

C2H5OH is the chemical formula for bioethanol - also known as alcohol.

Bioethanol Biodiesel
Produced from starch and sugar products such as corn, maize and sugarcane, and can be mixed with regular gasoline. Produced from vegetable oils or waste grease, and can be mixed with regular diesel.


Right now, biofuels are the only real alternative if you want to lower CO2 emissions from the transport sector.

In Denmark, the transport sector is responsible for about 30 % of the country’s energy consumption.

Follow the developments within biorefining. hveiti regularly informs about our efforts to improve the environment.

Follow hveiti on facebook