US2021178321A1PendingUtilityA1

Water vapor harvesting materials and devices

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Assignee: UNIV KING ABDULLAH SCI & TECHPriority: May 17, 2018Filed: Feb 22, 2021Published: Jun 17, 2021
Est. expiryMay 17, 2038(~11.8 yrs left)· nominal 20-yr term from priority
Inventors:Peng WangRenyuan LiYifeng ShiMengchun Wu
E03B 3/28C08J 3/075B01J 20/30B01J 20/26B01D 53/28B01D 53/26B01J 20/0222B01D 2259/40098B01J 20/3208B01D 2251/404B01J 20/0225B01D 2253/25B01J 20/0288B01J 20/046B01J 20/3236B01D 5/0027B01D 5/0057C08J 2333/26B01J 20/0296B01D 53/06B01J 20/28026B01J 20/321B01D 2253/202B01J 20/0229B01D 2251/302B01D 2257/80B01J 20/0237B01D 2251/402B01J 20/0244B01D 2251/60B01D 53/261B01D 2253/112B01D 53/263Y02A20/00
62
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Claims

Abstract

An atmospheric water harvesting material includes a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent.

Claims

exact text as granted — not AI-modified
1 - 20 . (canceled) 
     
     
         21 . A method for generating water from water vapor, the method comprising:
 absorbing water vapor by an atmospheric water harvesting material arranged on an outer surface of a cylinder, wherein the atmospheric water harvesting material comprises a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent;   rotating the cylinder so that a portion of the atmospheric water harvesting material that has absorbed the water vapor is facing a condensation chamber, which is arranged above the cylinder and has a light-admitting upper surface;   exposing the portion of the atmospheric water harvesting material facing the condensation chamber to solar energy passing through the light-admitting upper surface;   releasing, due to the solar energy, the water vapor from the portion of the atmospheric water harvesting material facing the condensation chamber into the condensation chamber; and   condensing, in the condensation chamber, the released water vapor into water,   wherein the condensed water is pure water or the water vapor is released exclusively due to the solar energy.   
     
     
         22 . The method of  claim 21 , wherein when the portion of the atmospheric water harvesting material is facing a condensation chamber, a second portion of the atmospheric water harvesting material is not directly exposed to the solar energy, the method further comprising:
 absorbing water vapor by the second portion of the atmospheric water harvesting material.   
     
     
         23 . The method of  claim 21 , wherein the atmospheric water harvesting material does not change phase from hydrophilic to hydrophobic while releasing the water vapor. 
     
     
         24 . The method of  claim 21 , wherein the condensed water is pure water. 
     
     
         25 . The method of  claim 21 , wherein the water vapor is released exclusively due to the solar energy.

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