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Similarities
- ethene is produced from crude oil by cracking
- ethene + steam -> ethanol (C2H4 + H20-> C2H50H)
- 300 degrees Celsius
- pressure of 60-70 atmospheres
- catalyst: phosphoric acid
- continuous process
- low labour costs
- high plant costs
- fast
- high purity product - 100% ethanol
- non-renewable
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Differences
- raw material is sugar
- glucose -> ethanol + carbon dioxide (C6H12O6 -> 2C2H5OH + 2CO2)
- 30 degrees Celsius
- .
- .
- .
- batch process
- labour intensive
- cheap plant costs
- slow
- low purity product - up to 15%
- renewable
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