VPSA oxygen system consists

VPSA oxygen system consists of a blower, a vacuum pump, the switching valve, a surge tank, and oxygen absorber composition. After the feed air intake filter to remove dust particles, is pressurized blower to 0.3-0.5barg into   activated zeolite powder 3a  which the one adsorber. Adsorber filled with an adsorbent, wherein moisture, carbon dioxide, and small amounts of other components in the gas inlet of the adsorber is loaded in the bottom of the absorption of the active alumina, and then the ASU molecular sieve sieve adsorbed nitrogen gas is filled in the upper portion of the activated alumina, zeolite molecular sieve. And the oxygen (including argon) as a non adsorbed component from the top outlet of the adsorber product gas is discharged to the oxygen surge tank.

Activated zeolite powders Sieved using carbon molecular sieves to achieve

Sieved using carbon molecular sieves to achieve the separation characteristics of oxygen, nitrogen purposes. Molecular sieve adsorption of impurities in the gas, only macropores 4a zeolite molecular sieves and mesopores channels play a role in the delivery of molecules to be adsorbed in the micropores and sub-micropores, is the volume of the micropores and sub-micropores that really Adsorption. As shown in the previous figure, the carbon molecular sieves comprise a large number of internal pores, the pores allowing the rapid kinetics of diffusion of small molecules into the hole size, while limiting the entry of large diameter molecules. Activated zeolite powders Due to the relative sizes of the diffusion rate of the gas molecules are different, the components of the gas mixture can be effectively separated.  dehydration of natural gas .Therefore, when producing a carbon molecular sieve, the molecular size depending on the size of the carbon molecular sieves should be the internal pore distribution 0.28 ~ 0.38nm. The pore size within the range, oxygen can quickly diffuse into the hole opening through the porous, and the nitrogen through the porous opening is difficult to achieve an oxygen, nitrogen separation. Microporous carbon molecular sieve pore size separation of oxygen, nitrogen base, if the pore size is too large, oxygen, nitrogen, into the pores of the molecular sieve is very easy, but there is no separation of the role; pore size is too small, oxygen, nitrogen can not enter micropores, but there is no separation.

Different points of various molecular sieve

5A molecular sieve can adsorb molecules smaller than the pore size of any generally known as calcium  molecular sieves. In addition it has a 3A, 4A molecular sieve has the effect, but also activated zeolite powder adsorbed C3-C4 n-alkanes, ethyl chloride, ethyl bromide, butanol, etc., can be applied to the separation of normal isoparaffin, Pressure swing adsorption technology and coadsorption of water and carbon dioxide. 5A molecular sieve based on the characteristics of industrial applications, we produce high-5A zeolite selective adsorption, absorption speed, especially for pressure swing molecular sieves adsorption, can be adapted to various sizes of oxygen, hydrogen, carbon dioxide and other gas system pressure swing adsorption unit, PSA is a boutique industry.

Natural gas ingredients

The main component of natural gas hydrocarbons, of which the vast majority of methane, while a small amount of ethane, propane and butane, in addition to generally hydrogen natural gas treatment processes sulfide, carbon dioxide, nitrogen and water vapor and small amounts of carbon molecular sieve desiccant monoxide and traces of noble gases such as helium and argon, etc. . Under standard conditions, methane exists in a gas state to a butane, pentane or more liquid. Methane is the shortest and lightest hydrocarbon molecule.

natural gas regeneration

Gas dryer is a use of molecular sieve adsorption purification of natural gas drying device is widely used in all aspects of the exploitation of natural gas, transportation, plus gas. Applications using temperature swing adsorption principle, the partial pressure of water vapor at room temperature high adsorption (work), at higher temperatures, low water vapor partial pressure to resolve gas regeneration. That adsorbent moisture adsorption in the adsorption process, the regeneration process again rely on high-quality effects angrily (dry air heated) and thermal diffusion mechanism can be completely removed. Advantages: The device is compact overall layout, adsorbent loading capacity, adsorbent long life, closed recycling, not consuming natural gas, the control panel features a text display, good maneuverability.