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What is pressure swing adsorption?


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Answered 2008-10-03 12:06:31

Pressure Swing Adsorption refers to the process of purification of Hydrogen gas which is manufactured in a plant like rfinery. Hydrogen which is formed as a by-product in process like Reforming is also used as a raw material within the refinery process like Hydrotreating and Isomerization. So it has to be made impurities free for use. So Hydrogen is purified by the process known as pressure swing adsorption in which impurities are adsorbed on the surface and Hydrogen becomes clean.

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What has the author Douglas M Ruthven written?

Douglas M. Ruthven has written: 'Pressure swing adsorption' -- subject(s): Adsorption


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Stephen Nicholas Barker has written: 'A survey of pressure swing adsorption cycles'


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What has the author Hans Ulrik Andreasson written?

Hans Ulrik Andreasson has written: 'Separation of oxygen and nitrogen by pressure swing adsorption using 5A molecular sieves'


What has the author Michael Carr Linton Oxley written?

Michael Carr Linton Oxley has written: 'Simulation of a four bed pressure swing gas adsorption system'


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They are as follows: 1)Temperature 2)Pressure 3) Surface of adsorbent 4) Nature of adsorption process (either chemi-adsorption of phsi-adsorption) that all these are the major factors affecting the rate of adsorption.


How would you purge oxygen from a tank with nitrogen?

Much would depend on the precise circumstances. In industrial cases, and some clinical situations, this can be done using pressure swing adsorption. Please see the link.


What is Freundlich adsorption isotherm and Langmuir isotherm?

At a given temperature, the extent of adsorption will increase with the increase of pressure of the gas. The extent of adsorption is measured as x/m, where mi= is the mass of adsorbent and x that of adsorbate. At low pressure, x/m varies linearly with p. As per Freundlich adsorption equation Taking log both sides of the equation, we get, At low pressure, x/m=kP At high pressure, x/m=kPo This is called Freundlich adsorption isotherm at a constant temperature. Freundlich isotherm fails at high pressure and is only for physical adsorption. Langmuir isotherm is represented as x/m=ap/(1+bp) (a and b are constants) At very high pressure,(bp>>1) x/m=a/b At very low pressure,(bp<<1) x/m=ap


What is the process called when gases you breath are separated?

An air separation plant separates atmospheric air into its primary components, typically nitrogen and oxygen, and sometimes also argon and other rare inert gases.The most common method for air separation is cryogenic distillation. Cryogenic air separation units (ASUs) are built to provide nitrogen or oxygen and often co-produce argon.Other methods such as Membrane, pressure swing adsorption (PSA) and Vacuum Pressure Swing Adsorption (VPSA), are commercially used to separate a single component from ordinary air.


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Does pressure effect on adsorption of oxygen?

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Does chemical adsorption have a high adsorption enthalpy?

no


What is the difference between the Freundlich and Langmuir adsorption isotherms?

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Does physical adsorption have a low adsorption enthalpy?

yes it does...even though physical adsorption is an exothermic reaction, its enthalpy of adsorption is pretty low aroun 20 to 40 kJ/mol


What is re-adsorption?

Re-adsorption is defined as the absorption of a substance that was previously removed. This process commonly occurs with water in the body.


Is chemical reaction involved in adsorption process?

Adsorption is generally a physical change.


Why adsorption is always exothermic?

adsorption means that the molecules of one phase are present in higher concentration at the surface of the second phase.ex.inert gases on charcoalwhen the temperature is increasing the adsorption decreases.so , we can say the adsorption is always exothermic.


What has the author Eduardo J Bottani written?

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What is hill isotherm?

The Langmuir equation (also known as the Langmuir isotherm, Langmuir adsorption equation or Hill-Langmuir equation) relates the coverage or adsorption of molecules on a solid surface to gas pressure or concentration of a medium above the solid surface at a fixed temperature.


What is adsorption?

Adsorption is the process of something being adsorbed - the adhesion of a liquid or gas on the surface of a solid material, forming a thin film on the surface.


What has the author Lawrence T Drzal written?

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What is the definition of adsorption?

Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.


Is fast sound waves the same as loud soundwaves?

No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.


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