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Flashcards in Ethanol Deck (12):
1

What hydrocarbon can be used to make ethanol?

Ethene

2

Define 'hydration'

1. Ethene is hydrated with steam

2. In the presence of an acid catalyst

3

What is the process of using ethene to make ethanol called?

Hydration

4

What are the 2 processes to make ethanol?

1. Hydration

2. Fermentation

5

What is the advantage of hydration?

It is a CHEAP process- ethene's fairly cheap and NOT much is WASTED

6

What is the disadvantage/ future problems involving hydration?

Ethene's produced from crude oil- which is NON-RENEWABLE

Therefore hydration will become very EXPENSIVE

7

What is the RAW MATERIAL for fermentation?

Sugar

8

What is the CATALYST for fermentation?

Yeast

9

What is the word equation for fermentation using sugar?

sugar -> carbon dioxide + ethanol

10

What are 5 advantages of fermentation over hydration?

1. Lower temp. - less energy - cheaper

2. Simpler equipment - easier

3. Renewable

4. Grown as a major crop in many parts of the world

5. Sugar cain is carbon neutral

11

What are disadvantages of fermentation?

1. Large areas of land needed - leads to destruction of habitats

2. Land could be used for food - could lead to food shortages / higher food prices - problem with increasing world pop.

3. Has to be purified - expensive

12

How could fermentation have economic benefits to countries?

The ethanol could be used as quite a cheap fuel in countries which don't have oil reserves for making petrol