 Therefore, companies like BP and DuPont have been looking at the next generation of biofuel, specifically investigating butanol.Specific advantages to using butanol compared to ethanol include, higher energy content per kg, the ability to be blended at higher concentrations without further adaptation of vehicles, and potential to use existing storage/transport infrastructure.However, using corn as a feedstock to produce either ethanol or butanol seems infeasible without significant technology improvements regarding yields.