Matériaux microporeux pour la collecte de l'eau atmosphérique
Year: 2025
Type: dissertation
Abstract: Fresh water scarcity is intensifying due to climate change and global population growth. This thesis focuses on developing an energy-efficient atmospheric water harvesting (AWH) technology to help address this challenge. Through a comprehensive evaluation of zeolites, zeolitic materials, and metal-organic frameworks (MOFs), AlPO-18 was identified as a highly promising adsorbent. It demonstrates exceptional water uptake across a wide humidity range and exhibits low regeneration energy consumption, comparable to MOFs, while offering superior hydrothermal stability. To further advance its practical application, the synthesis recipe of AlPO-18 was carefully optimized regarding the yield, cost, energy efficiency, and environmental impact. Scaled-up syntheses was then conducted using pilot-scale equipment to validate the updated recipe at the lab-scale. Building on this, further investigations were carried out on powder shaping and comprehensive assessments of AWH properties, thereby establishing a solid foundation for future industrial deployment.Following material scaling and shaping, this thesis also introduces a key innovation: incorporating multi-walled carbon nanotubes (MWCNTs) into the composite for rapid in-situ electrothermal regeneration. This method enables fast temperature changes (1.5 – 2.5 °C/s) without any performance sacrifice. The shaped composite remained stable over 10,000 cycles and proved applicable to other porous materials with diverse chemical frameworks.In summary, this thesis advances energy-efficient AWH technology through adsorbent selection and regeneration innovation. The introduction of aluminophosphate materials and MWCNT-assisted electrothermal regeneration not only supports innovation in AWH, but also offers large possibilities for other fields such as catalysis, carbon capture, and gas separation.
Source: theses.fr (ABES)
Author: Zhao, Haonuan
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7112224391
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