Nowadays, there are three globally applied essentially different technologies of gas separation: the most promising and advanced membrane technology, adsorption and cryogen technologies. The stationary and carried air separation and gas separation complexes commercially-produced by our company are manufactured on the basis of the state-of-the-art technologies utilizing the membrane and molecular-sieve principles of gas separation.

Adsorption Technology

The method of gas mixtures separation with the use of adsorbent materials capable of selectively adsorbing various gases was invented in the 50-s. Since its invention, the technology has gained wide application in the areas where high-purity gas is required in large volumes. The adsorption-based gas separation process often proves an advantageous replacement of the outdated cryogen technology.

Structurally, gas separation and air separation units utilizing the adsorption technique of gas separation consist of two columns, each containing a substance selectively adsorbing gas mixture components. The operating principle here is that the compressed air is initially passed though one of the columns as long as the adsorbent is capable of attracting (adsorbing) certain gases. Thereafter, the air flow is directed into the other columns, while the first column adsorbent is being regenerated.

The adsorption technology is based on the principle of adsorption of certain substances by molecular sieves, thus making possible the air mixture separation. The adsorption technology allows efficient recovery from air of such gases as nitrogen and oxygen.

The units operation is based on the swing adsorption technology with the use of air stream supplied under above-atmospheric pressure at the adsorption stage and diverted under below-atmospheric pressure at the desorption stage.

While air stream is passing through one of the two alternating adsorbers filled with adsorbent material carbonic-molecular sieve oxygen is being primarily adsorbed by the sieve and the gas medium is being enriched with nitrogen. After the carbonic-molecular sieve becomes saturated with oxygen, air stream is forwarded into the other adsorber, and the pressure in the exhausted adsorber is reduced to the atmospheric level. The latter is then purged with a part of product air removing adsorbed oxygen from the sieve and allowing regeneration of the sieve capacity. The adsorption-based air separation process runs within the temperature range of +10+40 C.



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