Butanol is a much better fuel and can be made from a larger number of feed stock and by a number of methods.
It can be made using biowaste. trash, sewage, Not from food like ethanol
Butanol is largely compatible with and in some ways better than, gasoline. It's air/fuel mixture (Stoichometric A/F Ratio) is 11.2 (Standard Gasoline
is 14.7, ethanol is 9.) which allows butanol to, just about, function in a standard gasoline engine. Its energy content is about 105,000 Btu per US
gallon (Standard Gasoline has about 114,000 Btu per US gallon). In effect butanol has about 92% of the energy of gasoline. In actual driving
conditions, as butanol has a strong power and torque content, drivers will use a lighter foot on the accelerator and hold a higher gear longer, fuel
efficiency will approximately match that of gasoline. It can be mixed with gasoline in any ratio in unmodified engines. Additionally, as butanol has a
very low vapour pressure point (RVP 0.3) and a high Flash Point (FP 37 degrees Celcius) it is a very safe fuel to use in high temperatures. Butanol
can be produced at an estimated cost of 85 cents per gallon, and is a direct replacement for gasoline, which ethanol cannot be. Butanol also has a
high cetane number (CN25, diesel averages CN45, ethanol CN9) which allows butanol to be blended with petrodiesel and with vegetable oils (where it
also reduces the gel temperature point and the viscosity) to produce biodiesel, with some positive environmental effects. Consequently, butanol is a
very versatile fuel and fuel extender in both gasoline and diesel engines. It can do things that ethanol will never be able to do. Its manufacture
from biomass will enhance the progress towards a biofuel World.
Butanol can also be used in direct alcohol fuel cells and being a liquid is can be stored in fuel tanks not high pressure tanks
any standard fuel station could be used to sell Butanol.