1. 5.6.1a Other Fuels
Hydrogen
Alcohol

2. Other Fuels Hydrogen CH4 + H2O = 3 H2 + CO Production Method 1
Steam Reforming of Natural Gas
CH4 + H2O = 3 H CO
In presence of a suitable catalyst

3. Other Fuels Production Method 2 Electrolysis of Water
using dilute H2SO4
as catalyst
forms at cathode [negative electrode]
Overall H2O = H /2 O2
Too expensive in most parts of world

4. Other Fuels Production Method 3
During cat-cracking of long chain alkanes
not a very important method

5. Other Fuels Uses of Hydrogen Haber Process for producing ammonia
N H2 = 2 NH3
Hydrogenating vegetable oils
Organic synthesis

6. Other Fuels
Fuel - about 10% of worlds production of hydrogen is used as fuel
Environmentally friendly
Water is the only product of combustion
H /2 O2 = H2O
Major problem it is explosive with air
Difficulties with storage and transport due to this and pressure

7. Challenger
Click here to see Challenger

8. Click button to see hydrogen car video

9. Hindenburg
Click here to see the Hindenburg

10. Petrol versus Hydrogen
Hydrogen 1299 kJ mol-1 [Heat of combustion]
Petrol 5512 kJ mol-1 [Heat of combustion]
1kg petrol kJ 1 kg hydrogen kJ [kilogram calorific value]
Hydrogen gives 13.4 times more heat per kg

11. Alcohol C2H5OH + 3½ O2 = 2 CO2 + 3 H2O
Can be made from waste sugar cane or any other natural sugar source e.g. sugar beet
Doesn’t really add to greenhouse effect
Growing plants removes C from the air and then returns it.
Can add up to 20% alcohol to petrol without changing engine [Gasohol] common in South America

12. Biodiesel Made from rape seed oil and used cooking fat.
Doesn’t add to greenhouse effect
Plants remove C from air then return it
Available now in some european countries