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Composite Salt in Porous Metal‐Organic Frameworks for Adsorption Heat Transformation
Author(s) -
GarzónTovar Luis,
PérezCarvajal Javier,
Imaz Inhar,
Maspoch Daniel
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201606424
Subject(s) - materials science , adsorption , chemical engineering , composite number , metal organic framework , chiller , porosity , salt (chemistry) , dissolution , composite material , organic chemistry , thermodynamics , chemistry , physics , engineering
Adsorptive heat transformation systems such as adsorption thermal batteries and chillers can provide space heating and cooling in a more environmental friendly way. However, their use is still hindered by their relatively poor performances and large sizes due to the limited properties of solid adsorbents. Here, the spray‐drying continuous‐flow synthesis of a new type of solid adsorbents that results from combining metal‐organic frameworks (MOFs), such as UiO‐66, and hygroscopic salts, such as CaCl 2 has been reported. These adsorbents, commonly named as composite salt in porous matrix (CSPM) materials, allow improving the water uptake capabilities of MOFs while preventing their dissolution in the water adsorbed; a common characteristic of these salts due to the deliquescence effect. It is anticipated that MOF‐based CSPMs, in which the percentage of salt can be tuned, are promising candidates for thermal batteries and chillers. In these applications, it is showed that a CSPM made of UiO‐66 and CaCl 2 (38% w/w) exhibits a heat storage capacity of 367 kJ kg −1 , whereas a second CSPM made of UiO‐66 and CaCl 2 (53% w/w) shows a specific cooling power of 631 W kg −1 and a coefficient of performance of 0.83, comparable to the best solid adsorbents reported so far.