By Wynell Graves

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It can be produced from biomass (as "biobutanol") as well as fossil fuels (as "petrobutanol"); but biobutanol and petrobutanol have the same chemical properties. Current use of butanol in vehicles Currently no production vehicle is known to be approved by the manufacturer for use with 100% butanol. e. 85% ethanol + 15% gasoline)in the USA. However, in Brazil all vehicle manufacturers (Fiat, Ford, VW, GM, Toyota, Honda, Peugeot, Citroen and others) produce flex fuel vehicles that can run on 100% ethanol or any mix of ethanol and gasoline.

As the heat of vaporization of butanol is less than half of that of ethanol, an engine running on butanol should be easier to start in cold weather than one running on ethanol or methanol. ) Alcohol-based fuels are not compatible with some fuel system components. Alcohol fuels may cause erroneous gas gauge readings in vehicles with capacitance fuel level gauging. While ethanol and methanol have lower energy densities than butanol, their higher octane number allows for greater compression ratio and efficiency.

Typical upgrades include modifications to: fuel tanks, fuel tank electrical wiring, fuel pumps, fuel filters, fuel lines, filler tubes, fuel level sensors, fuel injectors, seals, fuel rails, fuel pressure regulators, valve seats and inlet valves. "Total Flex" Autos destined for the Brazilian market can use E100 (100% Ethanol). 6 MJ. 1 liters/gallons of methanol. Although actual fuel consumption doesn't increase as much as energy content numbers indicate. Methanol has been proposed as a future biofuel.

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