This is second type of Deoxo unit is with additional after cleaning using copper for endothermic reaction for removal of extra oxygen, the moisture and hydrogen contents and maintained upto 1PPM level. This Ultra pure nitrogen gas finds application in electronic, synthetic fiber and optical fiber industries.

Process Description

This De-Oxo unit needs two externally heated filled with copper as catalyst for the endothermic reaction.

02 + 2Cu—-2CuO

The loaded copper bed can be regenerated by adding hydrogen during the regeneration step. For this two step process (Deoxidization and regeneration), two reactors are necessary to achieve a continuously operating De-Oxo system. The nitrogen form the PSA system with the remaining oxygen passes one of the reactors without adding hydrogen. ON passing through the reactor, the oxygen is removed by reacting with the copper surface, The advantage of the Deoxo unit based on the copper is that the high purity nitrogen leaves the unit absolutely dry & without any remaining hydrogen.

A typical representation for the plant is shown in the figure 1.3 below.



  • Metallurgical Industry
  • Heat Treatment / Annealing
  • Synthetic & Fiber Industry
  • Chemical Industries
  • Pharmaceutical Industry


Product Nitrogen Gas
Plant Capacity 1 – 1500 NM³/Hr.
Product Specifications
  • Oxygen – 1 PPM
  • Hydrogen – NIL
  • Nitrogen – 99.9997%
  • Dew Point – -60°C to -80°C
  • Pressure – 5 – 25 Bar