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Ammonia Cracker
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NH3-Cracker or hydrogen generator is used for the production of forming gas. Hydrogen and Nitrogen are generated in a cost effective way. In a volume ratio of 3 : 1 or in a weight ratio of 14 : 3. Capacities from 1m3/h to 60m3/h are available. Ammonia cracking is a simple and cost effective method of manufacturing hydrogen, however it may be used only in the applications, in which presence of nitrogen is acceptable. The NH3 is coming from bottles or from or bulk tanker. The ammonia gas is pre-heated in a heat exchanger and vaporizer and then cracked in the main furnace unit. The furnace is electrically heated by special LGO heating elements. The decomposition of ammonia gas NH3 takes place at a temperature of 920°C in the presence of a special grade nickel catalyst in an electrically heated furnace. 2 NH3 gives N2 + 3 H2 The cracked gas then passes to the heat exchanger for cooling and for pre-heating the incoming gas. This way and in combination with the low power consuming LGO heating elements, it can be made sure that only a minimum of electricity has to be used for the cracking process. * Ammonia cracking is a process of dissociation (decomposition) 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 special grade 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). Available Capacities. 0 m3/hour to 60 m3/hour. Salient Features * Easy to operate.* Low capital cost* maintenance free operation.* Low running cost* Available in diffrent capacities.* Long service life.* Very cost effective alternate for water Electrolysis Plants in terms of power, capital cost and running cost Applications * Annualy furnance in cold rolling industries.* For providing atmosphere in Hydrogen Bell.* For providing reduction in bulk drug.* Stainless steel wire annealing.* Continuous galvanizing lines.* Bi-metal products annealing.* Sintered products annealing.* Metal Powder annealing.* Brazing application.* Heat treatment.
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