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Fuels - Hydrogen.
How can Hydrogen be used as a Fuel?
can be used directly as a fuel for cars
or used in a fuel cell to produce electricity.
Hydrogen reacts with oxygen to produce water plus energy.
water + energy
2H2(g) + O2(g) 2H2O(l)
The energy released
by the reaction can be used to
run a car engine which is similar to
(but not the same as) car engines which burn petrol.
What are the Advantages of using Hydrogen as a Fuel?
1. Hydrogen can be made from the electrolysis
If the electricity used during electrolysis comes
from a renewable resource (solar power for example)
then the hydrogen fuel produced is also renewable.
used as a fuel does not
or contribute to global warming
because the only product of combustion is water.
What are the Disadvantages of using Hydrogen as a Fuel?.
1. Hydrogen does not
contain a lot of energy
compared to petrol.
A larger amount of hydrogen is needed to run a similar car.
2. Hydrogen is explosive and difficult to store.
3. If the hydrogen
does not come from a renewable
resource but is made from methane, then
the hydrogen fuel produced is also not renewable.
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