This system is comprised of two adsorbers and two electric heaters. By this system air purified by the adsorbers is below -65?. The purified air has a content of CO2? 1 ppm

The adsorbers are of a vertical & double-bed structure. The upper bed contains molecular sieve while the lower bed activated alumina and the two adsorbers work alternatively. Part of the air from the air cooling tower, after being rid of free water, CO2 and other Cn Hm via the adsorber, enters the cold box and the braking compressor (i.e. the booster) of the turbo-expander while the rest is used as the instrument air.

When one adsorber is in operation, the other is being regenerated and cooled. The waste nitrogen from the cold box enters the adsorber for regeneration after being heated to 180? by the electric heater to remove water and CO2 and then is vented to the atmosphere.

Salient Features

• There are many different types of gas purifiers which include nitrogen, helium and others
• A gas autoclave is a pressurized device that allows solutions such as liquid carbon dioxide to be heated to temperatures above the boiling point of water.
• A gas filter is designed to remove contaminants with relatively large particle sizes.


Generally, gas purifiers are used to purify gases in a process stream. In fact, these gas purifiers are used to reduce or eliminate point-of-use impurities in gases such as methane, nitrogen, oxygen, hydrogen, and carbon dioxide. A gas purifiers are most suitable to remove moisture, hydrocarbons, oxygen and other impurities that can decrease yields or form oxides and hazes. As we know, gas impurities can also cause distribution leaks, improper purging, and system breaches.

That’s why, some gas purifiers even use a multiple bed format and special sorbents. On the other hand, other gas purification products use adsorptive materials to capture and retain hydrocarbons and halocarbons. Gas fittings are used to connect gas purifiers to gas lines. In general, better systems contain fewer fittings since each connection in a gas delivery system provides the potential for leaks. At the same time, a manifold system features two compression fittings and an O-ring gas fitting for each cartridge.

A contaminant trap is supposed to have at least eight fittings before the gas supply reaches the gas chromatograph (GC). Typically, all gas purifiers are equipped to provide early warning signals whenever the gas stream becomes contaminated. Additionally, the gas purifiers with automated valves allow for the ability to isolate or bypass the purifier if an abnormal amount of contamination is encountered.