Coffee - A new source of biofuel

Besides that keeps us awake each day, coffee could be a good fuel for cars.
That's the idea behind a new study explains that the coffee beans used can be turned into biodiesel fuel. Coffee probably will not replace oil but remains a cappuccino never used that could one day help us to reduce environmental impact. They say that time will come when all the debris and food products we use will be a reliable source of biofuel.
For decades scientists have known that coffee beans contain oil. Susanta Mohapatra, a chemical engineer at the University of Nevada, and her colleagues were the first coffee beans analysers.
To make the analysis of coffee beans, they are first dried in an oven. Then they mix the result with a combination of solvents that separates oil result solution. They extract the oil, saving for the next round of processing solvents. Remaining debris could be used as compost, fuel ethanol or trays.
The study showed that the grains contain about 15% of oil used depends on the type of coffee. These proportions are not too far from soybean, canola and palm oils are also used as sources of biodiesel. Coffee oil is more stable than other sources because it contains high antioxidant.
Worldwide, farmers produce more than 16 billion pounds a year according to U.S. Agriculture Department. Scientists estimate that the beans used could bring about 340 million gallons of biodiesel to global biofuel supply.
Coffee beans can produce high quality oil, said Robert McCormick, an engineer at National Renewable Energy Laboratory in Golden, Colorado. He said coffee will probably be a practical solution for the needs of the energy of the world.
America's main sources of biodiesel are cooking oil and animal fats, 100% pure oil, compared to coffee which has 15% oil. Even  when a large quantity of coffee is boiling, a few grains are left behind. It takes 15 gallons of coffee consumed to produce just 1 gallon of oil, Mohapatra said.