Renewable Isobutanol: It's Time for a Truce - Biobased Digest
It overcomes essentially all the major deficiencies of ethanol as a fuel and can be produced in an ethanol plant. One of ethanol’s greatest drawbacks as a fuel is its high volatility. The nation’s base gasoline supply changed with the introduction of ethanol oxygenate. Inexpensive light ends were removed to produce the costlier Reformulated Blendstock for Oxygenate Blending (RBOB) to compensate for ethanol’s high volatility in the finished blend. Butanol, on the other hand, has very low volatility, allowing blending without the need for RBOB and freeing the refiner to obtain higher margins for heavier cuts. In fact it is sufficiently close to gasoline that it can be used at any blend ratio, even at 100 percent, obviating the need for Flex Fuel Vehicles. Testing this theory, physicist David Ramey, drove from Blacklick, Ohio to San Diego, California using 100 percent butanol in an unmodified 1992 Buick Park Avenue. The vehicle completed the trip without incident and achieved a 14 percent INCREASE in fuel mileage compared to 87 octane gasoline. Source: www.biofuelsdigest.com
