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Haber process biological nitrogen fixation

The atmosphere contains about 3.9 x lO tons of elemental nitrogen. Biological nitrogen fixation and production of NO in combustion and thunderstorms are the major natural sinks. Finally, NO deposits as HNO3 in rainwater. In the Haber process N2 fixes industrially. [Pg.110]

The total amount of dinitrogen fixed on a global basis is estimated at about 2.4 X 10 tons per year, and some 65% of this is pursued by nitrogen-fixing microorganisms. While the industrial Haber process, which accounts for about 25% of the total, is carried out at high temperatures (300-400°C) and pressures (350-1000 atm), the natural biological fixation proceeds under ambient conditions. [Pg.45]

See other pages where Haber process biological nitrogen fixation is mentioned: [Pg.204]    [Pg.84]    [Pg.88]    [Pg.714]    [Pg.835]    [Pg.210]    [Pg.354]    [Pg.101]    [Pg.456]    [Pg.835]    [Pg.493]    [Pg.714]    [Pg.440]    [Pg.262]    [Pg.503]    [Pg.449]    [Pg.7]    [Pg.286]    [Pg.111]    [Pg.130]    [Pg.299]    [Pg.351]    [Pg.36]    [Pg.7]    [Pg.331]    [Pg.7]    [Pg.41]    [Pg.412]    [Pg.569]    [Pg.1264]    [Pg.228]    [Pg.493]    [Pg.569]    [Pg.382]    [Pg.384]    [Pg.229]    [Pg.81]    [Pg.409]    [Pg.26]    [Pg.16]    [Pg.4]    [Pg.130]    [Pg.409]    [Pg.4899]    [Pg.257]    [Pg.266]    [Pg.182]   


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