Biomass energy


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Biomass energy

  1. 1. TheLa biomassa biomassJohan y Zayra 3ºB
  2. 2. 1 The biomass in spainThe biomass in the renewable source with thegreatest potential in Spain, quantified 257resources Mtoe. (Million tonnes of oil equivalent),equivalent to an amount greater than all theenergy consumption of Spanish industry.
  3. 3. 1.2However, government plans to spend just "staywhere you are": although official sources saysome 10 Mtoe usable resources
  4. 4. 1.3 Year, the authorities lack the political will to stopthrowing away all that potential energy and Plannational energy refers only to the use of 2.8Mtoe. In 2000.
  5. 5. 2 The biomass in the worldAlthough our country has made in the years 1996 and 1990 a total of 235 facilitiesusing biomass, we are still far from reaching the level of France, the leading countryof the EC in which six million households use wood as a source of heat, or Denmark,where a plant burns 28,000 tons of straw to produce 13 Mw. electricity. In Brazil some2,000,000 vehicles run almost pure alcohol, obtained from the cultivation of sugarcane, and 8,000,000 more use a mixture of gasoline and alcohol.
  6. 6. 2.1 the biomass in the worldOne of the most striking examples in the field of technology of renewable energysources in the case of the production of industrial alcohol by fermentation in Brazil. In1976, the Brazilian government decided to stop being the largest oil importer fromdeveloping countries, and embarked on a program for the mass production of ethanolfrom sugar cane molasses or cassava pulp for be used as fuel. Currently there arebetween 3 and 5 m of ethanol million per year. Much of the ethanol is blended withgasoline, and constitutes 20% of the fuel used by cars, thus saving fossil fuel(gasoline).
  7. 7. 3.METHODS OFconversion of biomass into energy. Thermochemical methods. These methods rely on the use of heat as a source of biomass conversion. They are well adapted to the case of dry biomass and, in particular, straw and wood.
  8. 8. 3.1The combustion of the biomass oxidation byoxygen in the air, simply releases carbon dioxideand water, and can serve for domestic heatingand for the production of industrial heat.
  9. 9. 3.2Pyrolysis, incomplete combustion of biomass inthe absence of oxygen, about 500 degreesCelsius, is used for a long time to producecharcoal.
  10. 10. 3.3 Apart from this, the pyrolysis takes releasing alean gas mixture of carbon dioxide andmonoxide, hydrogen and light hydrocarbons.
  11. 11. 3.4This gas, calorific weak, can serve to powerdiesel engines, or to produce electricity, or tomove vehicles.
  12. 12. 4.use of biomass● Forests. The only really biomass currently exploited. For energy is the forest to cover part of the energy demand can only be a reasonable option in countries where territorial density of such demand is very low, as well as the population (Third World).
  13. 13. 4.2● In Spain (otherwise timber deficit country) is only reasonable to consider the energy use of waste cutting and clean out and farm forestry (wood, branches, foliage, etc..) And the wood residues.
  14. 14. 4.3● In this regard, the underlying energy supply firings has been evaluated in 2.500.000tep, on the basis of which the production of wood (always in Spain) in t / ha is approximately equal to a quarter of the number growth annual timber in m3/ha.
  15. 15. 5.Agricultoral waste.● Agricultural waste and livestock manure and bedding. These are another important source of bioenergy, although not always give such reasonable profit. Following this approach, in Spain has evaluated a hypothetical 3.7 million toe energy supply from cereal straw.
  16. 16. 5.1● In Spain only seems advisable to use for this purpose from the chaff of cereals where the removal from the field does not appreciably affect the fertility of the soil, and livestock manure and bedding when no manure systematically use not to adversely affect agricultural productivity.
  17. 17. crops● Energy crops. Involves growing vegetables for the possibility of the use of energy crops. This option is not very profitable. Doubts increase in for temperate regions, where the photosynthetic assimilation is less than that which occurs in tropical areas.
  18. 18. 6.1● Doubts increase in for temperate regions, where the photosynthetic assimilation is less than that which occurs in tropical areas.
  19. 19. 6.1● It is discussed the desirability of crops or plantations for energy, not only for its profitability in themselves, but also to exert competition with food production and other necessities, (wood, etc.).
  20. 20. Energy CropsEnergy crops, also called "power crops," couldbe grown on farms in potentially very largequantities, just like food crops
  21. 21. Questions true or falseThe biomass are not renowable resources trueBiodiesel fuel no can be produced from soybeans,corn and sugar truecaneBiomas energy helps to generate electricity by biomass falseWood harves residues,crops urban refused ,and methane gas trueare not known as biomassBacteria and produce methane gas when they decompose falsebiomass materialsMethane gas can be used to air conditioned buildings trueBiodiesel fuel not can be used as fuel for cars false