Liquid fuels

thumb|Gasoline in a glass jar

right|thumb|upright|A kerosene bottle, containing blue-dyed kerosene

liquid fuel used in diesel engines

thumb|Experimental French Régiolis Class train using biodiesel thumb|Space-filling model of ethyl stearate, or stearic acid ethyl ester, an ethyl ester produced from soybean or canola oil and ethanol thumb|Two general pathways for biodiesels from a fat. The process starts with hydrogenation of backbone double bonds. [[Fatty acid methyl esters can then be produced by transesterification. C16 and C18 diesel fuels arise by hydrogenolysis of the saturated fat.]]

Butanol (also called butyl alcohol) is a four-carbon alcohol with a formula of C4H9OH, which occurs in five isomeric structures (four structural isomers), from a straight-chain primary alcohol to a branched-chain tertiary alcohol; all are a butyl or isobutyl group linked to a hydroxyl group (sometimes represented as BuOH, '''sec-BuOH, i-BuOH, and t-BuOH'). These are 1-butanol, two stereoisomers of sec-butyl alcohol, isobutanol and tert-butyl alcohol. Butanol is primarily used as a solvent and as an intermediate in chemical synthesis, and may be used as a fuel. Biologically produced butanol is

heavy fraction obtained from petroleum distillation that is burned to generate power

liquid state of the element hydrogen

type of aviation fuel

combustible fuel which is stored as a liquid

conversion of natural gas to liquid petroleum products

alcohols used as fuel for internal combustion engines

combination of liquid hydrogen and solid hydrogen