The Azimuth Project
Alcohol

Idea

Various alcohols can be used as fuels, and some have been proposed as substitutes, in a sense, for gasoline and other petroleum products.

Ethanol

Ethanol is a widely used biofuel, especially in Brazil. According to this article:

there are no longer any light vehicles in Brazil running on pure gasoline.

For more, see Biofuel, which has a discussion of ethanol, especially corn-based ethanol in the United States.

Methanol

See Methanol economy.

Butanol

According to

butanol can be produced as a biofuel, and is a possible competitor with ethanol:

Like ethanol, biobutanol is a liquid alcohol fuel that can be used in today’s gasoline-powered internal combustion engines. The properties of biobutanol make it highly amenable to blending with gasoline. It is also compatible with ethanol blending and can improve the blending of ethanol with gasoline. The energy content of biobutanol is 10 to 20 percent lower than that of gasoline.

Under U.S. Environmental Protection Agency (EPA) regulations, biobutanol can be blended as an oxygenate with gasoline in concentrations up to 11.5 percent by volume (i.e., the EPA considers blends of 11.5% or less biobutanol with gasoline to be “substantially similar” to pure gasoline). Blends of 85 percent or more biobutanol with gasoline are required to qualify as an EPAct alternative fuel. Biobutanol proponents claim that today’s vehicles can be fueled with high concentrations of biobutanol—up to 100%—with minor or no vehicle modifications, although testing of this claim has been limited.

category: energy