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We partner with Generon to deliver nitrogen generator systems using pressure swing adsorption (PSA) technology to our customers in New England. PSA nitrogen generators are typically used in application where high purity gas (more than 99.5% nitrogen) is a requirement. In the modern manufacturing environment, such as bio-medical technology and food processing, the requirement for high purity nitrogen and other analytical gases continue to grow.
How does PSA technology work?
PSA technology processes separate gases in air like nitrogen from oxygen and other trace gases. When under pressure, gases are attracted to solid surfaces in a process known as adsorption. If a gas mixture passes through a pressurized vessel filled with an adsorbent bed of zeolite carbon that nitrogen more strongly than it does oxygen, most or all the the nitrogen will stay in the bed. The gas coming out of the vessel be oxygen-rich. When the zeolite bed reaches its maximum absorption capacity, nitrogen can be regenerated by reducing the pressure in the vessel. The adsorbed nitrogen is released when the pressure drops to produced high-purity nitrogen. The cycle then repeats.
Generon Twin Tower PSA nitrogen generator system
PSA Nitrogen Generators
With purity levels up to 99.995 percent and flows up to 145,000 SCFH, each PSA nitrogen generator has two adsorber beds filled with a carbon molecular sieve (CMS). Compressed air enters one end of a bed. While the smaller oxygen molecules are adsorbed by the CMS, the larger nitrogen molecules pass through the sieve and are stored. Once the tube is saturated with oxygen, the first adsorber releases the gas, and the second adsorber starts the process over again.
Membrane Nitrogen Generators
Compressed air enters one end of a permeable membrane. The membrane is comprised of many hollow fibers. The nitrogen in the compressed air travels the length of the fibers, and exits at the other end of the membrane. The oxygen in the air passes through the sidewall of the fibers and exits through the sides of the membrane. This is textbook continuous flow, with no moving parts.
Skid-mounted generators are ideal where medium to large Nitrogen flow rates are required in a small footprint. Generon IGS Skidded Series can supply nitrogen flows from 480 scfh up to 170,000 scfh (13.6 to 4,500 Nm3/h) and delivery pressures from 130 to 180 psig (9.0 up to 12.4 bar g)