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Ammonia Cracking Unit

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The Ammonia Cracking Units are being used as an easiest & cheapest way of producing hydrogen by cracking of ammonia into its constituents for the past many years in India for industrial use. We have also made many innovations to make it safe, user’s friendly & economically cheap. The hydrogen is produced by cracking of ammonia in the presence of Nickel based catalyst at above 850 0C temperatures.
The Equipment:

  • The unit consists of a cylinder manifold or bulk storage, a pressure regulation system, 2-stage de-sulphurising unit, a heat economizer, Furnace of suitable rating, a centrifugally casted alloy retort of special alloy to withstand the heat & the pressure, nickel catalyst filled in retort, a heat exchanger followed by a moisture separator and a flow meter. A puri-dryer is used to remove un-cracked ammonia. Further hydrogen enrichment systems called PSA Hydrogen plants are being attached as per demand to meet stringent applications

The Technology:

  • The ammonia is drawn either from cylinders or from bulk storages and the conditioned before being passed through a pressure regulating valve for desired pressure output.
  • This ammonia is then passed through a liquid separation followed by a 2-stage De-sulphurisation unit so as to avoid any oil & sulphur effect on the catalyst and then through a heat economiser the ammonia is being pre-heated and then enter the Retort which is filled with Nickel Catalyst.
  • Though the ammonia cracks at 850 Deg C into its constituents but Molsieve prefer to operate at 900 Deg C. temperature as residual un-cracked ammonia reduces below 50 PPM at 900 Deg C temperature.

The ammonia cracks as per reaction below:

  • 900 0C
    2NH3 --
    N2
    3 H2
    Nickel Catalyst
  • Further a heat reactivated, dual bed system is used to remove moisture & un-cracked ammonia present in cracked ammonia to produce a bone dry gas.
  • We have further developed a system called PSA Hydrogen Enrichment Unit which is being employed after the puri-dryer and enrich the hydrogen to 95-99% as desired through an adsorption system.
  • This is again a dual bed system filled with special grade of molecular sieve which adsorb nitrogen from cracked gas mixture. These units are very popular with Auto Parts Manufacturers, particularly for SS Brazing, SS Sintering & SS Annealing and Hydrogenation of chemicals and even in Power sector.
    Specification:


MODEL NO.CAPACITYGAS QUALITY
MN-AC-ELECTRIC-LP
(Low pressure)
1-200 NM3/HR
Single unit
H2:75%, N2:25% Dew Point (-) 20 0C
MN-AC-ELECTRIC-HP
(High pressure)
1-200 NM3/HR
Single unit
H2:75%, N2:25% Dew Point (-) 20 0C
MN-AC-LPG/Diesel/PNG
Heating through LPG/Diesel/PNG firing
1-200 NM3/HR
Single unit
H2:75%, N2:25% Dew Point (-) 20 0C
MN-AC-D1-200 NM3/HR
Single unit
H2:75%, N2:25% Dew Point (-) 80 0C
MN-AC-D-PSA1-200 NM3/HR
Single unit
H2: 95-98%,
N2: 5-2% Dew Point (-) 80 0C

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