Biofuels are fuels extracted from agro-energy. In other words, they can be obtained from the processing of agricultural raw materials, biomass, and wood. For these reasons, biofuels are considered a renewable energy source. Biofuels can be used in replacement of oil to power engines, cars, and machinery. Few people know that the first diesel engine invented by Rudolf Diesel in 1893 working right with peanut oil. During the twentieth century to the plant, it was preferred fossil fuel that source, produced by the nascent oil industry. Only in recent years, biofuels are coming back into vogue as a response to the depletion of oil resources, the rising prices of crude oil and the problem of global warming.