Ethanol

Question 0

Manufacturing of ethanol using fermentation

Answer 0

The raw material used is is sugar then it’s converted into ethanol using yeast
At temperature of 30 C
Uses renewable resources that are easy to grow
Ethanol produced is not very concentrated

Question 1

How is ethanol manufactured

Answer 1

Ethene is produced from crude oil
Ethanol is produced by passing Ethene and steam over a phosphoric acid catalyst at a temperature of 300 C and pressure of 60-70 atm

Question 2

How is ethanol dehydrated to form Ethene

Answer 2

Removing water from ethanol turns it back into Ethene using the dehydration reaction
Ethanol vapour is passed over a hot catalyst of aluminium oxide and provides a large surface area for the reaction

Question 3

Ethene and steam ads/disads

Answer 3

Very fast, low labour costs
Pure
But it is a finite resource used and expensive equipment needed

Question 4

Fermentation ads/disads

Answer 4

Very slow, uses sugar as a renewable source
Uses cheap equipment but high labour costs
Very impure and needs further processing