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Ammonia cracking is a process of dissociation of gaseous anhydrous Ammonia (NH3) into a mixture of Hydrogen (H2) and Nitrogen (N2) according to the reaction:2NH3 = N2 + 3H2 The reaction is endothemic, requiring 383 kJ/mol. The process is performed at increased temperature within the range 1560-1740ºF (850-950ºC) in the presence of nickel as catalyst.The resulting gas mixture is composed of hydrogen and nitrogen in the proportion 3:1 (75% of H2 and 25% of N2) with very little amount (20 -100 ppm) of residual undissociated ammonia with dew point -60ºF to -20ºF (-51ºC to -29ºC). The gas may be further purified by molecular sieves purifier resulting in reducing the uncracked ammonia to 1-3 ppm with dew point -110ºF (-80ºC).The principal flow scheme of ammonia cracker is presented in the figure: 

 

? Annealing furnaces with reducing atmosphere for continuous heat treatment of cold rolled steel.

? Bell type annealing furnaces.

? Sintering of metals.

? Metal powder annealing.

? Brazing.

? Hydrogenation of oil.

? Heat Treatment)) Edible Oil Industry

? Chemical & petrochemical Industry

? Chemical process Industry 

 

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