Manufacture of ethanol (Edexcel GCSE Chemistry): Flashcards
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Two methods to produce ethanol
Two methods to produce ethanol
Hydration of ethene and fermentation of sugars
Hydration of ethene equation
Hydration of ethene equation
Temperature for hydration of ethene
Temperature for hydration of ethene
300°C
Pressure for hydration of ethene
Pressure for hydration of ethene
60-70 atm
Catalyst for hydration of ethene
Catalyst for hydration of ethene
Phosphoric acid ()
Source of ethene for hydration
Source of ethene for hydration
Cracking crude oil
Fermentation equation
Fermentation equation
Temperature for fermentation
Temperature for fermentation
30-40°C
Oxygen requirement for fermentation
Oxygen requirement for fermentation
Anaerobic (no oxygen)
Catalyst in fermentation
Catalyst in fermentation
Yeast
Max ethanol % before yeast dies
Max ethanol % before yeast dies
About 15%
Advantages of hydration of ethene
Advantages of hydration of ethene
Continuous process, pure ethanol
Advantages of fermentation
Advantages of fermentation
Renewable raw materials, low energy input