Sorbents for carbon dioxide reduction from indoor air
AssigneeEnverid Systems, Inc.
InventorsUdi Meirav, Israel Biran
Life of this patent
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Abstract
A sorbent for CO2 reduction from indoor air from an enclosed space. In some embodiments, the sorbent comprises a solid support and an amine-based compound being supported by the support. The sorbent captures at least a portion of the CO2 within the indoor air. The sorbent may be regenerated by streaming outdoor air through the sorbent to release at least a portion of the captured CO2. The sorbent is structured to allow indoor air to flow therein with relatively low flow resistance and relatively rapid reaction kinetics. Regeneration may be performed at relatively low outdoor air temperatures, thereby minimizing the thermal energy required for regenerating the sorbent.
Claims20
A sorbent for reduction of CO2 from indoor air of an enclosed space, comprising:
- a plurality of solid particles having an average diameter dimension in the range of 0.1-10 millimeters, and wherein at least some of the particles comprise:
- a support material;
- and
- an amine-based compound, wherein at least 25% of amine functional groups are secondary amines,
- wherein the amine-based compound further comprises water, wherein the support is combined with the amine-based compound;
- and wherein the amine-based compound is configured to capture at least some of the CO2 within the indoor air of the enclosed space and release at least a portion of the captured CO2.
A sorbent for reduction of CO2 from air of an enclosed space, comprising:
- a support comprising a plurality of solid particles having an average diameter dimension in the range of 0.1-10 millimeters;
- and
- an amine-based compound comprising a polyamine having between 25%-75% of secondary amines and water, and wherein the amine-based compound is configured to capture at least some of the CO2 within the indoor air of the enclosed space and release at least a portion of the captured CO2 by streaming air or other gas through the sorbent.
A method for reducing CO2 contained in air from an enclosed environment, the method comprising:
- providing a sorbent comprising a support including a plurality of solid particles having an average diameter dimension in the range of 0.1-10 millimeters;
- and an amine-based compound comprising a polyamine having between 25%-75% of secondary amines and water,
- streaming a first gas comprising CO2 from inside an enclosed environment through the sorbent such that the sorbent captures at least some of the CO2 from the first gas;
- and
- streaming a second gas through the sorbent such that the sorbent releases at least some of the captured CO2 to the second gas.
Dependencies are inferred from the claim text.