Production of ethanol (Edexcel GCSE Chemistry): Flashcards

Process where yeast converts sugars to ethanol and $CO_2$

30°C to 40°C

Zymase, acts as catalyst

Anaerobic (absence of oxygen)

Turns into ethanoic acid (vinegar)

$C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2$

10-20%

78°C

Lower boiling point (78°C vs 100°C)

Above 20%

Sugar cane is renewable

Lower temps needed, less energy

Batch process, less efficient

Ethanol impure, needs distillation