Required flow rate of regeneration gas during vacuum swing adsorption

[nightsky565]

Hi folks,

I am trying to understand a particular design for a vacuum swing adsorption system. This particular system is being used to dehydrate a gas stream using zeolite 3A with two packed beds (one regens while the other is in the pressurized adsorption cycle).

What I do not understand is how they designer chose the flow rate of regen gas to supply to the regenerating column. The regen gas comes in the form of a slip stream split off of the dehydrated product flow. They are recycling approximately 50% of the dehydrated product back for regeneration which seems astonishingly high.

Any assistance is duly appreciated!

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[sa12345]

There is a method in GPSA to calculate the regeneration flow rate.

[engraw]

please i need any book or document about design an unit of pressure swing adsorption