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THE REACTION
Ammonia is made by combining nitrogen and
hydrogen.
+ Hydrogen ­ obtained from cracking hydrocarbons
or natural gas.
+ Nitrogen ­ obtained from air.
Reaction is reversible and can reach
equilibrium.
The forward reaction is exothermic, the
backward is endothermic.…read more

Slide 3

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EQUILIBRIUM
Higher yield (shift to right): A compromise is made
so the reaction
Low temperature
produces the most
High pressure ammonia in the fastest
However low temperature way at the optimum
makes the reaction slow. price.
450 degrees.
Lower yield (shift to left):
200 atmospheres.
High temperature
Iron catalyst.
Low pressure Under these conditions
Faster but lower yield. about 15% is
converted to ammonia.…read more

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PROCESS
The unreacted gases can be easily removed as
they remain as gases when the ammonia is
cooled so can be tapped off to recycle.…read more

Slide 5

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USES OF AMMONIA
Manufacture of fertilisers.
Manufacture of nitric acid.
Manufacture of nylon.…read more

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