Haber process


Also found in: Dictionary, Thesaurus, Wikipedia.

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.
..... Click the link for more information.
, 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.
..... Click the link for more information.
 in 1909, was the first commercially important high-pressure chemical process.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

Haber process

[′hä·bər ‚prä·səs]
(chemical engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
"We think the simplest way to explain the signal in both objects is the Haber process. Comets hit the atmosphere in the presence of a lot of water and you get both nitrate and ammonia, which is what both ice cores show," he said.
The Haber process provided a new supply of "fixed" nitrogen to make fertilizers that are now responsible for sustaining one-third of the world's population.
* Anhydrous ammonia, 82 percent nitrogen, results directly from the Haber process. The word "anhydrous" means "without water." It is the main pressured liquid and is applied as shown in figure 14-2.
In industry, what substance is made by the Haber process? 5.