Ethanol Flashcards Preview

Real C1 > Ethanol > Flashcards

Flashcards in Ethanol Deck (8):
1

[ ] (C₂H₄) can be [ ] with steam (H₂O) in the presence of a [ ] to make ethanol

Ethene
hydrated
catalyst

2

What's good about the ethene--> ethanol process?

1) At the moment it is cheap because ethene is fairly cheap and not much is wasted

3

What is bad about the ethene--> ethanol process?

1) Ethene's produced from crude oil, which is non-renewable resource that is running out
2) This means that using ethene to make ethanol will become very expensive

4

How is the ethanol that is in beer and wine made?

Fermentation of sugar

5

What is the word equation for the fermentation of sugar?

Sugar -> Carbon dioxide + ethanol

6

What is needed to ferment sugar?

Yeast

7

What are the advantages of making ethanol through fermentation rather than from ethene?

1) Lower temperature and simpler equipment than with ethene
2) The raw material is a renewable source (fermentation)
3) Ethanol (fermentation) can e used as quite a cheap fuel in countries which don't have oil reserves for making petrol

8

What are the disadvantages of making ethanol through fermentation rather than from ethene?

The ethanol you get fro fermentation isn't very concentrated, so if you want to increase it's strength you have to distil it. It also needs to be purified