Fuels

Question 1

Fossil Fuels cons

3

Answer 1

high carbon emissions
greenhouse gases
global warming

Question 2

Natural gas con

1

Answer 2

• dangerous when compressed flammable gas

Question 3

LPG con

1

Answer 3

• lower fuel value than petrol -> must use more

Question 4

Coal pro

1

Answer 4

cheap

Question 5

Natural gas pro

1

Answer 5

lower carbon emissions than coal

Question 6

LPG pro

2

Answer 6

lower carbon emissions
can be stored as liquid at lower pressures than LG

Question 7

Biofuels source

Answer 7

produced from biomass (organic matter)

Question 8

Cycle of ethanol

Answer 8

Glucose fermented-> ethanol combusion-> CO2 -> photosynthesis back to glucose

Question 9

Production of biofuels

2

Answer 9

• fermentation of waste sugar, waste wheat starch -> bioethanol
• trans-esterification of oilseed crops or waste animal fats -> biodiesel

Question 10

Biofuels pros

3

Answer 10

• lower carbon emissions than fossil fuels
• consdiered carbon neutral bc CO2 returns back to plants thru photosynthesis
• lower sulfur content = lower SO2 emissions

Question 11

Biofuels cons

2

Answer 11

• lower fuel emission value
• made from agriculture (finite resources)

Question 12

Carbon emission value

Answer 12

g(CO2)/MJ