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Diesel on coffee grounds

18.06.2009

Indian chemist Manoranjan Misra is a big coffee lover. Once, leaving an unfinished cup for the whole day, he noticed that the black drink was covered with a thin iridescent film resembling oil.

Misra became interested in its composition. It turned out to be the liquid oil found in coffee beans. Calling on the help of Japanese and American colleagues, the chemist began experimenting with coffee grounds, which were supplied free of charge by the nearest cafe.

After treatment with an organic solvent and alkali, the oil separated from the thick is reacted with methyl alcohol - and fuel for a diesel engine is obtained. A liter of fuel comes out of 5-7 kilograms of coffee grounds. The pilot plant produces 4 liters per day, processing 20-25 kilograms of used ground coffee.

"Coffee" fuel is half the price of gasoline. Since the whole world consumes more than seven million tons of coffee per year, the waste could provide 1,3 million cubic meters of liquid fuel.

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