The Production of Ethanol

Summary of production (temperatures, pressures, catalysts) of ethanol and pos/negatives

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  • Created by: Kate
  • Created on: 20-02-14 15:07
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  • The Production of Ethanol
    • CrudeOil
      • Cracking of the naptha fraction
        • Ethene
          • 300 degrees
          • 60 atmospheres
          • Phosphoric Acid (H3PO4) catalyst
          • Water (H2O)
          • Advantages
            • Relatively fast
            • Process is continuous
            • Produces pure ethanol
          • Disadvantages
            • Requires high technology
            • Uses a lot of energy
            • Crude Oil is a non renewable source of energy
    • Fermentation
      • Glucose
        • 35-55 degrees
          • Compromised temperature for enzymes to function
        • Absence of air (no oxygen)
          • This prevents oxidation of ethanol to ethanoic acid
          • Anaerobic respiration of yeast
        • Advantages
          • low technology process - can be used anywhere
          • It does not use much energy
          • Sugar cane is a raw material - renewable source
        • Disadvantages
          • Batch Process - once 15% of ethanol is produced, enzymes stop working
            • Vessel must be emptied before reaction can start again
          • Relatively slow process
          • Produces fairly impure ethanol

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