Page 109 - Chemical and process design handbook
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Speight_Part II_A 11/7/01 3:16 PM Page 2.50
2.50 MANUFACTURE OF CHEMICALS
Hydrogen and nitrogen recycle
Hydrogen
Reactor Separator
Compressor
Nitrogen
Liquid ammonia
FIGURE 1 Ammonia manufacture from hydrogen and nitrogen by the Haber process.
Shift converter Methanator Separator
Carbon dioxide Ammonia
Reformer
removal converter
Flash gas
Desulfurized naphtha
or natural gas Carbon dioxide Ammonia
FIGURE 2 Ammonia manufacture from natural gas or naphtha.
oxygen of the air reacts with the hydrocarbon feedstock in combustion and
helps to elevate the temperature of the reformer. Otherwise nitrogen can be
added from liquefaction of air. In either case a hydrogen-nitrogen mixture
is furnished for ammonia manufacture.
