Startup Global Bioenergies uses genetic engineering to avoid one of the costliest steps in biofuel production.
Test plant: Global Bioenergies is adapting this test facility, owned by the European research organization Fraunhofer, to produce biofuels using a new process that avoids a costly distillation step.
Audi is investing in a startup, Paris-based Global Bioenergies, that says it can make cheap gasoline from sugar and other renewable sources. The strategic partnership includes stock options and an unspecified amount of funding.
As with conventional biofuel production, Global Bioenergies technology uses microrganisms to ferment sugars to produce fuel. But its process eliminates the second most costly part of producing biofuelsthe energy-intensive distillation step. And by making gasoline instead of making ethanol, the startup skirts a major problem hampering growth in biofuelsthe fact that the market for ethanol is saturated.
Global Bioenergies has demonstrated its technology in the lab and is building two pilot facilities to produce isobutene, a hydrocarbon that a partner will convert into gasoline through an existing chemical process. The larger of the two pilot facilities will be big enough to support the production of over 100,000 liters of gasoline a year.
The process addresses one of the key challenges with conventional biofuels productionthe fuel can kill the microrganisms that make it. In a conventional fermentation process, once the concentration of ethanol gets to about 12 percent, it starts to poison the yeast so that it cant make any more ethanol.
Global Bioenergies has genetically engineered E. coli bacteria to produce a gas (isobutene) that bubbles out of solution, so its concentration in the fermentation tank never reaches toxic levels. As a result the bacteria can go on producing fuel longer than in the conventional process, increasing the output of a plant and reducing capital costs.
The isobutene still needs to be separated from other gases such as carbon dioxide, but Global Energies says this is much cheaper than distillation.
The new process doesnt address the biggest cost of biofuels todaythe cost of the raw materials. Its designed to run on glucose, the type of sugar produced from corn or sugarcane. But the company is adapting it to work with sugars from non-food sources such as wood chips, which include glucose but also other sugars such as xylose.
Audis partnership with Global Bioenergies is part of push by the automaker to reduce greenhouse gas emissions in the face of tightening regulations. Audi recently announced two other investments in cleaner fuels. It funded a project to make methane using renewable energythe methane can be used to run Audis natural-gas fueled cars (see Audi to Make Fuel Using Solar Power). And it funded Joule Unlimited, which is using photosynthetic microrganisms to make ethanol and diesel (see Audi Backs a Biofuels Startup).
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Audi Bets on Bio Gasoline Startup
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