Biofuel is any fuel biological unless it is fossil. Originate mixing of one or more plants as well as: cane sugar, castor tree, soybean, canola, lepidopoides, babassu, junk organic, among other types.Types of biofuelIn Portugal, are considered biofuels, under Decree - Law No. 62 / 2006 [1] (Decree - law transposing the subject to policy no. 2003 / 30 / EC and creates mechanisms to promote the marketing of minimum quotas of biofuels; provides ten types), the following products:bioethanol: Ethanol produced from biomass and / or fraction biodegradable waste for use as biofuel;Biodiesel: ester and/or ethyl produced from vegetable oils or animals, quality diesel fuel for use as biofuel;biogas: fuel gas produced from biomass and / or fraction biodegradable waste, which can be purified quality natural gas for use as biofuel or woodgas;biometanol: produced methanol from biomass for use as biofuel;) "dicarbonate: dimethylether produced from biomass for use as biofuel;Bio - ETBE ((methyl ethyl - tert - butyl alcohol): ETBE produced from of bioethanol, the percentage by volume of bio - ETBE considered as biofuel equal to 47%;Bio - MTBE () "methyl - tert - butyl alcohol): fuel produced based on biometanol, and the percentage by volume of bio - MTBE considered as biofuel 36%;biofuels: synthetic oil man-made hydrocarbon mixtures synthetic produced from biomass;"biohydrogen": hydrogen produced from biomass and / or fraction biodegradable waste for use as biofuel;pure vegetable oil produced from oil: oil produced by pressure, extraction or processes comparable, crude or refined but chemically unmodified, when its use is compatible with the type of engines and their requirements for emissions.ConceptsBiofuels are renewable energy sources, derived from materials such as agricultural, forestry, biomass cane sugar and other organic material. There are several types of biofuels: ethanol, biodiesel, biogas, biomass, biometanol, dicarbonate (methyl, bio - ETBE, bio - MTBE, biofuels, "biohydrogen".But the main biocombustiveis are: biomass ethanol, biodiesel and biogas.BiomassBiomass is a source of clean energy and renewable available in great abundance and derived from organic materials. All bodies able to perform photosynthesis (or derivatives of them) can be used as biomass. Example: wood, manure and vegetable oil or even junk urban. The maximum is being done to obtain energy from biomass, since the oil and coal are precautions, electrical power is increasingly scarce (since this energy depends on the strength of water) and nuclear energy is dangerous. Another important factor is that humanity this producing increasingly garbage and trash this also is capable of producing energy, this helps solve various problems: lower level of environmental pollution, containing the volume of junk of cities and increase energy production. Benefits: clean energy and renewable, less corrosion of equipment, waste issued for his burning do not interfere in the greenhouse effect, be a source of energy, be decentralizing income, reduce dependence on oil from underdeveloped countries, decrease the garbage industrial (as it can be useful in the production of biomass), low - cost deployment and maintenance.Four ways of transforming biomass energy:pyrolysis: through this technique, biomass is exposed to altissimas temperatures without the presence of oxygen, aimed at accelerating decomposition. What dregs of decomposition is