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BIOCHEMICAL FUELS

BIOCHEMICAL FUELS . Biochemical fuels (biofuels) are fuels derived from plant materials such as grains, sugarcane or vegetable waste, and vegetable oils Renewable and sustainable There are two main biofuels, ethanol and biodiesel Doesn’t increase atmospheric carbon dioxide

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BIOCHEMICAL FUELS

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  1. BIOCHEMICAL FUELS

  2. Biochemical fuels (biofuels) are fuels derived from plant materials such as grains, sugarcane or vegetable waste, and vegetable oils • Renewable and sustainable • There are two main biofuels, ethanol and biodiesel • Doesn’t increase atmospheric carbon dioxide • It is used alone or blended with fossil fuels such as petrol or diesel

  3. The plant materials used in the generation of biochemical fuels are produced by photosynthesis, which removes carbon dioxide from the atmosphere and produce glucose 6CO2(g) + 6H2O(l)  C6H12O6(aq) + 6O2(g)

  4. ETHANOL – C2H6O

  5. Ethanol is a two-carbon member of the alkanol homologous series, found on alcoholic drinks • It is used in thermometers as a solvent and as a fuel • Ethanol can be called ethyl alcohol, pure alcohol or drinking alcohol • Ethanol is volatile, flammable and is a colorless liquid

  6. PRODUCTION OF ETHANOL FROM GRAIN

  7. WASTE PRODUCED DURING REACTION • One of the waste of the reaction, carbon dioxide is sold to manufacturers of soft drinks • The waste water and cooling water can be used for irrigating crops, and the protein rich remains from the fermentation can be sold as animal feed

  8. PROPERTIES FOR ETHANOL Molecule formula: C2H6O Molar mass: 46.07 g/mol Appearance: colourless Density: 0.789 g/cm³ (at 20°C) Melting point: -114°C,159K, -173°F (low melting point) Boiling point: 78.37°C, 352K, 173°F Vapor pressure: 5.95 kPa (at 20°C) Acidity:15.9 Basicity:-1.9

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