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US 12,097,463 B2Granted
Gas stream purification by adsorption with pre-regeneration in a closed loop
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorGolo Zick
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Abstract
A gas stream is purified by a TSA adsorption scheme including at least two adsorbers following, in an offset manner, a cycle including an adsorption phase, and a subsequently, a regeneration phase. The regeneration phase includes a depressurization step, a pre-regeneration step and a regeneration step. A gas circulator is used to circulate the gas within the adsorber in the pre-regeneration step in a closed loop while the circulating gas is heated with a heater.
Claims6
A plant for purifying a gas stream by TSA adsorption, comprising:
- at least two adsorbers configured in a countercurrent arrangement, following, in an offset manner, a cycle comprising subsequent phases of an adsorption phase and a regeneration phase, wherein the adsorption phase includes an adsorption step and a depressurization step, and wherein the regeneration phase includes a pre-regeneration step and a regeneration step;
- a pressure-regulating valve for depressurizing the adsorber at the start of the regeneration phase;
- a gas circulator for circulating the gas within the adsorber in pre-regeneration in a closed loop;
- and
- a heater for heating the gas circulating in the closed loop.
2 more elements
Dependencies are inferred from the claim text.