Nitrogen Membrane Technology is another efficient alternative to PSA nitrogen systems. It utilizes a high selectivity membrane for nitrogen gas separation. The material is a semi-permeable layer made of thousands of flexible, cylindrical filaments with pore sizes ranging from 0.03 to 10 microns to separate nitrogen gas, dry, compressed air is applied over the material which is housed in a cylindrical vessel.
The membrane allows N2 to pass through but inhibits oxygen, water vapor, inert gases, and air-borne impurities. The selectivity of the membranes is highly dependent on pore size. Membrane type nitrogen generators can generate nitrogen gas with purities up to 99 % Nm3/hr.
