Haber process

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Related to Haber's process: Le Chatelier's principle, Frasch process, Contact process, Haber Bosch process

Haber process

(hä`bər), commercial process for the synthesis of ammoniaammonia,
chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor.
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, NH3. Pure hydrogen and nitrogen gases are mixed in the appropriate proportion, heated to between 450°C; and 600°C;, compressed to about 1,000 atmospheres pressure, and passed over a catalyst. The reaction is 3H2+N2⇋ 2NH3+heat. The ammonia gas is liquefied by rapid cooling; unreacted nitrogen and hydrogen are returned to the reaction chamber. This process, developed by Fritz HaberHaber, Fritz
, 1868–1934, German chemist. He was a professor of physical chemistry at Karlsruhe and became director of the Kaiser Wilhelm Institute at Dahlem in 1911.
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 in 1909, was the first commercially important high-pressure chemical process.

Haber process

[′hä·bər ‚prä·səs]
(chemical engineering)

Haber process

an industrial process for producing ammonia by reacting atmospheric nitrogen with hydrogen at about 200 atmospheres (2 × 107 pascals) and 500°C in the presence of a catalyst, usually iron