Metal-organic frameworks as regeneration optimized sorbents for atmospheric water harvesting

被引:32
作者
Bezrukov, Andrey A. [1 ]
O'Hearn, Daniel J. [1 ]
Gascon-Perez, Victoria [1 ]
Darwish, Shaza [1 ]
Kumar, Amrit [1 ,2 ]
Sanda, Suresh [1 ]
Kumar, Naveen [1 ]
Francis, Kurt [2 ]
Zaworotko, Michael J. [1 ]
机构
[1] Univ Limerick, Bernal Inst, Dept Chem Sci, Limerick V94 T9PX, Ireland
[2] Mol RnD LtD, Nexus Innovat Ctr, Tierney Bldg TG025, Limerick V94 NYD3, Ireland
来源
CELL REPORTS PHYSICAL SCIENCE | 2023年 / 4卷 / 02期
基金
爱尔兰科学基金会;
关键词
ADSORPTION; SORPTION; VAPOR; KINETICS; DEHUMIDIFICATION; HYDROPHILICITY; NANOCRYSTALS; PHYSISORBENT; ADSORBENTS; CHEMISTRY;
D O I
10.1016/j.xcrp.2023.101252
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
As the freshwater crisis looms, metal-organic frameworks (MOFs) with stepped isotherms lie at the forefront of desiccant develop-ment for atmospheric water harvesting (AWH). Despite numerous studies on water sorption kinetics in MOF desiccants, the kinetics of AWH sorbents are a challenge to quantify. Here, we report that the AWH kinetics of seven known MOFs and the industry-standard desiccant Syloid are limited by diffusion to the sorbent bed surface. A quantitative model that exploits isotherm shape enables simula-tion of sorption cycling to evaluate sorbent performance through productivity contour plots ("heatmaps"). These heatmaps reveal two key findings: steady-state oscillation around partial loading op-timizes productivity, and dense ultramicroporous MOFs with a step at low relative humidity afford superior volumetric performance un-der practically relevant temperature swing conditions (27 degrees C, 30% relative humidity [RH] -60 degrees C, 5.4% RH). Cellulose-desiccant com-posites of two such regeneration optimized sorbents retain the ki-netics of powders, producing up to 7.3 L/kg/day of water under these conditions.
引用
收藏
页数:16
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