GRASYS possesses the unique experience in the design and manufacture of gas separation equipment and commands all the three existing gas separation technologies: membrane, adsorption and cryogenic ones. This enables the Company to offer its customers the solutions exactly meeting their needs and thus, ensuring significant costs savings.

Membrane technology

The basis for gas media separation accomplished with the use of membrane systems is the difference in the rate of the membrane material penetration by various gas mixture components. The separation effect is due to the difference in partial pressures on different membrane sides. A hollow-fiber membrane consists of porous fibers with the separation layer applied to their external surface.

Adsorption technology

At the core of the adsorption gas media separation process is the phenomenon of individual gas mixture components fixation by a solid substance called adsorbent. This phenomenon stems from the interaction of the gas and adsorbent molecular forces. The underlying principle of the adsorption gas separation systems operation is the dependence of the gas components sorption process on temperature and partial pressure. Therefore, the control of the gas adsorption and adsorbent regeneration processes is carried out by means of pressure and/or temperature variation.

Cryogenic technology

The operating principle of cryogenic plants consists in air liquefaction and its subsequent separation with the recovery of nitrogen, oxygen, and argon. The feed air is initially cooled to the temperature of 93 °К, where it is turned into liquid. Then, nitrogen evaporation begins caused by the difference in the boiling points of its components (nitrogen — 77.36 °К, oxygen — 90.18 °К), while the residual liquid is becoming increasingly saturated in oxygen.

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