Aluminophosphate - Based adsorbents for atmospheric water generation

Samar N. Abd Elwadood, Ludovic F. Dumée, Yasser Al Wahedi, Ali Al Alili, Georgios N. Karanikolos

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Freshwater resources are being heavily depleted and not replenished at the same high rate, thus, atmospheric water vapor harvesting has earned growing interest. Development of high-performing desiccant or adsorbent materials offering high sorption capacity and selectivity as well as regeneration capability in atmospheric conditions is crucial to tackle water scarcity. The required properties to generate potent water sorbents include pore accessibility, high specific surface area and porosity to enable high capture capacity and kinetics, and hydrothermal resilience to resist cyclic sorption and desorption. Further, polarity, hydrogen bonding, adhesion ability of water molecules to adsorbent surface, and hydrophilic functional groups can boost water adsorption. A highly promising class of water vapor adsorbents is the aluminophosphate molecular sieves (AlPOs), which are microporous zeotype materials. In this review, AlPO-based adsorbents are discussed for water sorption applications and a link is established between performance of materials and their chemical and morphological properties. Synthesis-properties-performance relationships are elucidated in light of synthesis techniques and adsorption behavior, and prospects to enhance AlPOs' water vapor sorption performance toward large-scale water harvesting applications are highlighted.

Original languageBritish English
Article number103099
JournalJournal of Water Process Engineering
Volume49
DOIs
StatePublished - Oct 2022

Keywords

  • AlPOs
  • Aluminophosphates
  • Atmospheric water generation
  • Desiccants
  • Water sorption

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