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US 2026/0225026 A1Published application
Carbon dioxide capture system using a liquid desiccant, and methods thereof
OwnerYanhui Yuan, Jason K. Ward +1inventors
InventorsYanhui Yuan, Jason K. Ward, Benjamin A. McCool
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Abstract
Systems and methods for providing carbon dioxide direct air capture (DAC) systems to improve energy efficiency, operability, and economic performance of DAC technologies based on several types of approaches including moisture swing adsorption (MSA) are disclosed. In particular, DAC systems including an absorber unit, a carbon capture unit, a water vapor-generating unit, and a liquid desiccant regenerating unit are disclosed.
Claims14
A system comprising:
- (a) an absorber unit comprising a liquid desiccant configured to receive an ambient air stream comprising water and carbon dioxide, and to absorb water from the ambient air stream to form (i) a first stream having a water content less than the water content of the ambient air stream and (ii) a second stream comprising water and the liquid desiccant;
- (b) a carbon capture unit downstream of the absorber unit configured to receive the first stream, the carbon capture unit comprising a moisture swing adsorbent configured to reversibly operate in (i) capture mode to adsorb water and carbon dioxide from the first stream and produce a carbon dioxide-depleted dried air stream and (ii) regeneration mode to release adsorbed water and carbon dioxide to produce a third stream;
- (c) a water vapor-generating unit in communication with the carbon capture unit configured to deliver a water vapor stream to the carbon capture unit during regeneration mode;
- and
- (d) a liquid desiccant regenerating unit configured to receive (i) the second stream and (ii) ambient air, the carbon dioxide-depleted dried air stream from the carbon capture unit in capture mode, or a combination thereof and remove water from the second stream to produce (iii) a stream comprising dried liquid desiccant and (iv) a humid air stream comprising water removed from the second stream.
2 more elements
A method for removing water and carbon dioxide from an ambient air stream comprising:
- (a) feeding an ambient air stream into an absorber unit comprising a liquid desiccant, wherein the liquid desiccant absorbs water in the ambient air stream to form a first stream having a water content less than the water content of the ambient air stream and a second stream comprising water and liquid desiccant;
- (b) feeding the first stream to a carbon capture unit comprising a moisture swing adsorbent configured to capture water and carbon dioxide, thereby forming a carbon dioxide-depleted dried air stream;
- and
- (c) feeding (i) the second stream and (ii) a second ambient air stream or the carbon dioxide-depleted dried air stream from the carbon capture unit to a liquid desiccant regenerating unit, thereby forming a dried liquid desiccant and humid air stream.
1 more element
Dependencies are inferred from the claim text.