Butanol Is Better than Ethanol as a Biofuel?

Here is some exciting information I gleaned from a posting in Green Car Congress. Check it out:

Test Results Show Biobutanol Performs Similarly to Unleaded Gasoline

New fuel testing results on bio-derived 1-butanol presented by DuPont and BP at the SAE World Congress indicate that biobutanol has proven to perform similarly to unleaded gasoline on key parameters, based on ongoing laboratory-based engine testing and limited fleet testing.

According to BP Biofuels program manager Frank Gerry, biobutanol formulations meet key characteristics of a “good” fuel, including high energy density, controlled volatility, sufficient octane and low levels of impurities.

He described early testing data that indicate that biobutanol fuel blends at a nominal 10 vol% level perform very similarly to unleaded gasoline fuel. Additionally, the energy density of biobutanol is closer to unleaded gasoline.

[Inset: 1-butanol is less volatile than ethanol, and butanol-gasoline blends are less volatile than ethanol blends. Adding a fraction of butanol to an ethanol blend brings down the volatility. Source: BP]

Butanol does not phase-separate in the presence of water, unlike ethanol. With a lower oxygen content than ethanol, higher volumetric concentrations of butanol could be blended into gasoline while still adhering to oxygen limits. Fuel testing also has proven that biobutanol does not phase separate in the presence of water, and has no negative impact on elastomer swelling.

Combined with ethanol in gasoline blends, butanol can bring down the vapor pressure of the fuel.



8 Responses to Butanol Is Better than Ethanol as a Biofuel?

  1. Butanol looks great as a replacement for gasoline.

    The two stage anerobic continuious fermentation process using the waste from cheese making as the raw material is likely to provide a better fuel at a lower cost than ethanol from corn. This is not the BP DuPont process.

    Birney Summers
    The Energy Boomer

  2. […] Biobutanol from Wheat Straw I have written before that Butanol is a much more real, viable, and more serious contender as a gasoline replacement fuel […]

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  5. Dhairyashil Patil says:

    But, it is economical to produce than ethanol?

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