Pressure Swing Adsorption PSA Plant

Atmospheric air is filtered, compressed, and cooled to remove dust, oil, and moisture. The dry compressed air is passed through two pressure swing adsorption (PSA) towers which operate alternately. These have  

If very pure N2 is required, the remaining O2 is removed by combining with a stream of injected hydrogen in the presence of palladium catalyst producing water vapour. The gas is cooled and dried to remove water. 

Twin tower units with copper catalyst are used alternately (if H2 is not acceptable) where in copper combines with oxygen to produce CuO, and very pure N2 is obtained as the product after cooling the exit gas. It is stored in a receiver. 

The copper catalyst is regenerated by reacting CuO with hydrogen. The gas is purged out during this operation. 

Main system components to be checked before procuring the N2 generating facility  

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The pressure at the outlet of the pressure-swing adsorption (PSA) plant is 1.5 MPa. The specific electricity requirement for the compression from 1.5 to 88 MPa at the compressed gaseous hydrogen (CGH2) filling station (required for 70 MPa on-board vehicle storage) amounts to about 0.077 MJei/MJ of CGH2. 

We have synthesized carbon materials from hydrolysis lignin and tested them in the separation of gaseous mixtures He-CR. The a orbents show a helium concentration capacity of up to He no 95-99 %vol. They appear proved to be promising for application in the pressure swing adsorption (PSA) plants for Hj h He concentration. 

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