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Rapid pressure swing adsorption, or RPSA, is frequently used in portable oxygen concentrators. It allows a large reduction in the size of the adsorbent bed when high purity is not essential and when the feed gas (air) can be discarded. [7] It works by quickly cycling the pressure while alternately venting opposite ends of the column at the same ...
Vacuum swing adsorption (VSA) uses the same principle as PSA but swings between vacuum pressures and atmospheric pressure. [2] PSA and VSA techniques may be combined and are called "vacuum pressure swing adsorption" (VPSA) in this case.
pressure swing adsorption principle: Image title: CSS3 animation of the principle of pressure swing adsorption to purify oxygen from air by CMG Lee. (I) denotes the air input, (O) the oxygen output, (E) the exhaust, (A) adsorption and (D) desorption. (1) and (2) show alternating adsorption and desorption. Width: 100%: Height: 100%
A nitrogen generator Bottle of 4Å molecular sieves. Pressure swing adsorption provides separation of oxygen or nitrogen from air without liquefaction. The process operates around ambient temperature; a zeolite (molecular sponge) is exposed to high pressure air, then the air is released and an adsorbed film of the desired gas is released.
The Hertz–Knudsen equation describes the non-dissociative adsorption of a gas molecule on a surface by expressing the variation of the number of molecules impacting on the surfaces per unit of time as a function of the pressure of the gas and other parameters which characterise both the gas phase molecule and the surface: [1] [2]
Desiccation and purification of air; dehydration and desulfurization of natural gas and liquid petroleum gas; oxygen and hydrogen production by pressure swing adsorption process 10X: F-9, Ca-X: 8: 0.50–0.60: 23–24: 0.3–0.6: High-efficient sorption, used in desiccation, decarburization, desulfurization of gas and liquids and separation of ...
The adsorption sites (heavy dots) are equivalent and can have unit occupancy. Also, the adsorbates are immobile on the surface. The Langmuir adsorption model explains adsorption by assuming an adsorbate behaves as an ideal gas at isothermal conditions. According to the model, adsorption and desorption are reversible processes.
Michael Polanyi, FRS (11 March 1891 – 22 February 1976) was a Hungarian polymath, who made theoretical contribution to physical chemistry, economics, and philosophy.. Polanyi was a well known theoretical chemist who contributed to the chemistry field through three main areas of study: adsorption of gases on solids, x-ray structure analysis of the properties of solids, and the rate of ...