arrow).The forward reaction (from left to right) is exothermic.
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Industrial Conditions.
This reaction is reversible (shown by the arrow).
The forward reaction (from left to
right) is exothermic.
nitrogen
+ hydrogen ammonia (
+ heat).
N2(g)
+ 3H2(g)
2NH3(g) (
+ heat)
The
industrial conditions are
1) Temperature
between 450 °C and
500 °C.
2) Pressure of
200 atm (200
atmospheres).
3) Use an iron catalyst.
Only about
15% of the reactants are converted into products
under these conditions.
Ammonia is cooled and liquefied
at the reaction pressure,
and then removed as liquid ammonia.
The remaining mix of nitrogen and hydrogen
gases (85%)
are recycled and fed in at the reactant
stage.
The process operates continuously.
In the
next few pages we shall look
in detail
at the conditions used in industry for this
process.
Headings Reversible
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