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Ever since the debut of the Audi R10 in 2006, the mighty diesel-powered sports cars have been running on a gas-to-liquid (GTL) diesel fuel supplied by Shell. For the 2008 running of the 24 hours of Le Mans coming up in a few weeks, Audi and Shell will try a new blend that combines the GTL fuel with a BTL (biomass-to-liquid) fuel supplied by Choren. Choren is a German company that has been collaborating with Audi's parent company Volkswagen to develop the BTL diesel branded as SunFuel. Like cellu

Germany's Chancellor Angela Merkel has inaugurated the "first refinery of second generation" biofuels in Freiberg. The plant, owned by Choren, which partners with car companies VW and Daimler and the Shell oil company, produces BTL (biomass-to-liquid) fuel from any kind of biomass, such as wood chips, straw, weeds or leftover milk rejected by the agrofood industry.

A new synthetic diesel fuel produced using a Fischer-Tropsch process based biomass-to-liquids (BTL) technology, and developed by Shell and Choren Industries, will be launched in Europe later this year.

Nextant, a technology solutions and consulting services company, has published a new report, "Liquid Biofuels: Substituting for Petroleum", which concludes that biodiesel traditionally produced from crops is most likely a transitionary technology. Biodiesel, which is a biodegradable, low-toxicity product, will be around for a long time even if it is not able to substitute for more than a small percentage of the world's total diesel consumption, the report says. Bioethanol is also identified as a