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US 2021/0346837 A1Published application
Extremely Large Pressure Swing Adsorption Processes for Flue Gas Treatment
AssigneeUniversity of South Carolina
InventorsJames A. Ritter, Armin D. Ebner, Charles E. Holland
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Abstract
The current disclosure provides systems and methods for multiple beds undergoing a feed step at the same time with the same feed flow rate and multiple beds undergoing a light reflux step at the same time with the same light reflux flow rate to process a gas stream in a multi-bed, multi-unit vacuum swing adsorption (VSA) process using reasonably sized beds.
Claims25
A system for reducing excessive pressure drop in a pressure swing adsorption process comprising:
- a number of beds expressed as nF+nLR+3 wherein at least one bed is a feed bed, nF, and at least one bed is a light reflux bed, nLR;
- a unit block cycle duration tUB expressed as tUB=t1+t2+t3, with the cycle duration tC expressed as tC=tUB(nF+nLR+3);
- wherein at least two feed beds undergo a feed step (F) at a same time with a same feed flow rate and at least two light reflux beds undergo a light reflux (LR) step at a same time with a same light reflux flow rate, wherein the feed step and light reflux step durations are substantially equal;
- and
- wherein the system undergoes at one equalization step.
2 more elements
A method for reducing excessive pressure drop in a pressure swing adsorption process comprising:
- operating in parallel a number of beds expressed as nF+nLR+3 wherein at least one bed is a feed bed, nF, and at least one bed is a light reflux bed, nLR;
- arranging multiple feed beds to undergo a feed step (F) at a same time with a same feed flow rate;
- arranging multiple light reflux beds to undergo a light reflux (LR) step at a same time with a same light reflux flow rate;
- equalizing substantially duration of the feed step and light reflux step;
- and
- undergoing at least one equalization step during the method.
3 more elements
Dependencies are inferred from the claim text.