Ethanol has excellent fuel properties for spark ignition
internal combustion engines. For example, its high octane and
high heat of vaporization make alcohol more efficient as a
pure fuel than gasoline [2]. Industrial alcohol is produced from
various substrates like molasses, maize starch, sugarcane,
sugar beet, tapioca etc. But most of the immediate expansion
in ethanol production is expected to rely on traditional
technologies for use of grains (e.g., from corn and wheat)
and some sugar (e.g., cane and beet sugar). In fact, large scale
use of grains puts upward pressure on grain prices