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Product Descreption :

E TECH – CU DXO MODEL PSA NITROGEN PLANT

 

Cu Deoxo Model contains an extra nitrogen purification module based on copper deoxo catalyst. This model finds application in synthetic fiber, optical cables & electronic industries. Running cost of this unit is slightly higher because it produces very pure nitrogen gas i.e free from oxygen and hydrogen as well. It is applicable where hydrogen contents are detrimental to the process. 

Alternately where hydrogen in product nitrogen is not acceptable, Copper De-Oxo units are used. In this system, one tower remains in the Oxygen removal cycle, whereas, the other tower undergoes regeneration of the catalyst. Oxygen removal is obtained by reaction of Oxygen present in Nitrogen with Copper Catalyst as per following equation.

2Cu  +  O2  =   2CuO

This reaction takes place at around 1800C.  For this purpose tower is provided with an embedded heater. Raw-nitrogen passes through the heater before it comes in contact with the copper catalyst. The out-going nitrogen will be totally free from oxygen. As indicated above, the spent catalyst i.e. CuO is converted back to copper by injecting Hydrogen – Nitrogen mixture in the tower under regeneration, so that copper catalyst gets regenerated as per following reaction:

CuO   +   H2    = Cu  +   H2O

This reaction also takes place at a temperature of around 1800C. which is achieved by the heater embedded in the tower. Nitrogen – Hydrogen mixture, which is used for reaction of spent catalyst is vented to atmosphere. Each tower of copper catalyst remains in Oxygen removal cycle for a period of 8 hours and towers then get changed over automatically which the help of sequence timer provided in the control panel. Pure nitrogen gas coming out of Copper Catalyst De-oxo Reactor will be at 2000C. and its temperature will be brought down to ambient level through an after-cooler which is a shell and tube type heat exchanger. The pure and dry nitrogen gas at ambient temperature.

MODEL NAME

E TECH – CU DXO

Flow Rate

1-1000NM³/ hr

Nitrogen

~100%

Hydrogen

 NIL

Oxygen

<3 PPM

Dew Point

(-)40°C to (-)80°C

 


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