Thursday, 16 May 2013

3.11 evaluate the factors relevant to the choice of method used in the manufacture of ethanol, for example the relative availability of sugar cane and crude oil


  • Cane sugar widely avalible/ cheap/ renewable
  • Slow process
  • Impurities in the product
  • Done in batches

Hydrating (ethene and steam)

  • Crude oil (cracked to make ethene) expensive/ non-renewable
  • Fast process
  • Pure product
  • Continuous reaction


  1. * use of resources
    *type of process
    *rate of reaction
    *quality of product
    * reaction conditions

  2. Mentioning the high temperatures and pressure for hydration of ethane is also necessary and fermentation only uses quite low temperatures and ordinary pressure