A blog from University of Borås

Wednesday, March 11, 2015

Ethanol ED95 for diesel trucks

Ethanol is well known as an additive or substitute for cars with gasolines. For this purpose, hydrous ethanol (e.g. less than 95% ethanol and the rest is water) is dehydrated to ethanol with 99% purity and mixed with gasoline.

Now, ethanol is also produced commercially for diesel engines. Diesel engines have a high compressions and use no ignitions. In order to match these properties,  hydrated ethanol (e.g. 95%) is supplemented with about 5% additives to obtain ED95. This mixture has about 92% ethanol, ca 4% water and 4% other additives. It is produced now by Agroetanol here in Sweden and is being used by light trucks (26-tons with 270 hp bioethanol engines) in Stockholm. Such trucks are about 10,000-15,000 USD more expensive than diesel trucks as the engines need different compressions. The examination of these trucks show an average reduction of 68-85% GHG emission compared to fossil fuels. I wish good luck with this work!

1 comment:

  1. Good and interesting information! Thanks for sharing this, Sir.