In the Haber process for manufacturing ammonia, the catalyst used is
Correct answer: A. finely divided iron with promoters
- A. finely divided iron with promoters
- B. platinum
- C. vanadium pentoxide
- D. nickel
Explanation
Iron with small amounts of potassium and aluminium oxide as promoters is used because it is effective and cheap enough for a process operating on this scale. Vanadium pentoxide is the catalyst of the Contact process for sulphuric acid and nickel is used in the hydrogenation of oils, both of which appear here as familiar but wrong answers. The gases are recycled repeatedly since a single pass converts only about fifteen per cent.
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About Haber's Process
Haber's process produces ammonia by reacting nitrogen with hydrogen in a reversible, exothermic equilibrium. The topic covers the iron catalyst, operating temperature and pressure, Le Chatelier's principle, the compromise between reaction rate and equilibrium yield, and the removal and recycling of ammonia and unreacted gases.
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