The separation of high-purity industrial gases is a specific process that is based on critical separation stages where a highly specialized molecular sieve is essential. The process uses the molecular sieve to produce high-purity oxygen from an air stream by adsorption of the basic components of the air.

Oxygen generation is necessary for glass production, steel manufacturing and mining as well as wastewater treatment facilities where it is necessary to have consistent, dependable, secure supplies of high-purity oxygen.

Industrial oxygen generation can apply to one of several areas:

Cryogenic separation is the term used for processes that involve air separation units (ASUs). In cryogenic air separation, the air is divided into its basic primary components of oxygen, nitrogen and other trace gases, including argon. This is accomplished by passing the air through the molecular sieve to remove carbon dioxide, water, nitrous oxide and small hydrocarbons and then passing that ultra-dry air stream into a cold box (i.e., at cryogenic temperatures) where the remaining components fractionate into ultra-pure forms of oxygen, nitrogen, argon and noble gases. It is essential that the molecular sieve is highly dynamic for impurity removal, possesses excellent adsorption and desorption kinetics and has excellent physical properties. Cryogenic separation is a method used to generate oxygen with a purity of greater than 99.9%

Pressure swing adsorption (PSA) separation is another area of industrial oxygen generation. PSA technology takes advantage of the affinity of the components in the air for the molecular sieve under pressure. In PSA oxygen generation, the pressure is increased to a point where the nitrogen affinity for the molecular sieve is far greater than that of oxygen. The molecular sieve adsorbs the nitrogen, and an oxygen rich stream – up to approximately 95% purity – of air remains. The pressure is then decreased to release the nitrogen and effectively regenerate the bed so the process can be repeated.

Vacuum pressure swing adsorption (VPSA) takes advantage of the same technology as PSA; however, VPSA uses vacuum pressure, or the difference between atmospheric pressure and absolute pressure generated by a vacuum blower. The vacuum swing allows for maximization of the adsorption and desorption by taking advantage of the full isotherm curve for the lithium molecular sieve. The VPSA process is applied in production plants, skid-mounted units and medical oxygen units. It has the benefit of providing high-purity oxygen with a compact footprint and power savings compared to ASU and PSA.

BA13X molecular sieve is used to remove water and CO2 prior the air entering the distillation portion, because low temperatures would cause  them to freeze and deposit on the surfaces of equipment.

Synonym: Zeolite 13X,  13X molecular sieve, 13X-APG,13X-HP, BASF 13X Molecular Sieve, CECA Airsiev®, Axens AxSorb 913

Typical Chemical Formula: Na2O . Al2O3 . m SiO2 . n H2O (m < 2.35)

CAS NO.: 1318-02-1

In an Air Separation Unit (ASU), the first step is to remove water, carbon dioxide, nitrogen oxide and traces of hydrocarbons and SOHO 13X molecular sieve with activated alumina combination are used for cryogenic air separation to remove moisture and CO2.

Downstream, the air is processed in a cryogenic distillation column in order to produce highly pure nitrogen (N2), oxygen (O2) and argon (Ar).

BOAO 13X Molecular Sieve for Cryogenic Air Separation has a high dynamics of impurity removal, good adsorption and desorption kinetics, and excellent physical properties. Cryogenic air separation is a method to produce oxygen with a purity greater than 99.9%.

Lithium-exchanged molecular sieve provides twice the nitrogen capacity of earlier adsorbents and permits the design of the smallest, most energy efficient units.

Synonym: Lithium molecular sieve, Lithium X molecular sieve, CECA Nitroxy® 51, UOP OXYSIV™ molecular sieve, OXYSIV MDX, Zeochem ZEOX® Z12-07 and ZEOX® Z12-49

CAS NO.: 1318-02-1

BOAO LiX molecular sieve is the lithium form aluminosilicate with X type crystal structure. And it is specially developed and designed molecular sieve for oxygen production from air with international advanced level.lithium based high performance oxygen enrichment sieve bed;designed for industrial VPSA oxygen plant,Capacily: 310 -10000 Nm3/hour, oxygen purity is up to 93%±3%;Its N2 adsorption capacity is 3 times larger than A type oxygen enrichment molecular sieve bed.it is utilized in medical oxygen concentrators with flow rates up to 10 liters per minute as well as smaller personal oxygen concentrators with minimum power consumption.

BOAO Li-LXS molecular sieve has exceptional nitrogen capacity, extraordinary kinetics and superior selectivity to yield high-purity oxygen streams from the air with outstanding mechanical strength and durability.it is mainly used for the VPSA oxygen concentrator.

Solutions

The application of Lithium X molecular sieve in VPSA Oxygen Generators

The main characteristics of BALTH-100 series are as follows:

a) BALTH-100 series molecular sieve has the characteristics of higher nitrogen adsorption capacity, high nitrogen with oxygen selectivity and easy desorption etc.

b) BALTH-100 series molecular sieve has nitrogen adsorption capacity is 2-3 times larger than A type oxygen enrichment molecular sieve bed.

c) BALTH series molecular sieve has good wear resistance and longer service life.

Therefore, It can significantly increases the economic benefits of oxygen production by lowering operating costs and energy consumption.

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