Bio Fuels

Question 1

BioFuels are…

Answer 1

renewable source of energy. It is made from plant or animal products.

Question 2

Biodiesel

Answer 2

Made from oils extracted from plants.

Question 3

Biogas

Answer 3

Generated from animal waste.

Question 4

Advantages of biofuels

Answer 4

• much less harmful to the animals and plants if it is spilled
• burns much more clearly, reducing the number of particulates produced
• will become cheaper to use, as fossil fuels are running out
• it is CO2 neutral

Question 5

Disadvantages of biofuels

Answer 5

• C02 is released to the atmosphere when harvesting, producing and transporting the fuel
• use large areas of farmland
• deforestation to grow more crops
• starvation in poorer countries

Question 6

BioEthanol

Answer 6

Is a type of biofuel. Can be made by fermenting sugar solution, extracted from sugar cane or sugar beet

Question 7

How is ethanol made?

Answer 7

• fermenting sugar solution, using yeast
• yeast’s enzyme provide a natural catalyst
• fermentation takes place in large vats at a temperature between 20 - 30 degrees
• this produces dilute ethanol solution
• ethanol is extracted by distillation