19.15.1 Ethanol Fuel.
A major option for converting photosynthetically produced biochemical energy to forms suitable for internal combustion engines is the production of ethanol. By the fermentation of sugars from biomass. Suitably designed internal combustion engines can burn pure ethanol is blended in proportions of around 10 % with gasoline to give gasohol, a fuel that can be used in existing internal combustion engines with little or no adjustment.