Air-Con Metal-Organic Frameworks in Binder Composites for Water Adsorption Heat Transformation Systems

Serkan Gökpinar, Sebastian Johannes Ernst, Emrah Hastürk, Marc Möllers, Ilias El Aita, Raphael Wiedey, Niels Tannert, Sandra Nießing, Soheil Abdpour, Alexa Schmitz, Julian Quodbach, Gerrit Füldner, Stefan K. Henninger, Christoph Janiak*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Metal-organic frameworks (MOFs) currently receive high interest for cycling water adsorption applications like adsorption heat transformation for air-conditioning purposes. For practical use in adsorption heat pumps (AHPs), the microcrystalline powders must be formulated such that their high porosity and pore accessibility are retained. In this work, the preparation of millimeter-scaled pellets of MIL-160(Al), Al-fumarate (Basolite A520), UiO-66(Zr), and Zr-fumarate (MOF-801) is reported by applying the freeze granulation method. The use of poly(vinyl alcohol) (PVA) as a binder reproducibly resulted in highly stable, uniformly shaped PVA/MOF pellets with 80 wt % MOF loading, with essentially unchanged MOF porosity properties after shaping. The shaped pellets were analyzed for the application in AHPs by water adsorption isotherms, over 1000 water adsorption/desorption cycles, and thermal and mechanical stability tests. Furthermore, the Al-fum pellets were applied in a fixed-bed, full-scale heat exchanger, yielding specific cooling powers from 349 up to 431 W/kg (adsorbent), which outperforms the current commercially used silica gel grains in AHPs under comparable operating conditions.

Original languageEnglish
Pages (from-to)21493-21503
Number of pages11
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number47
DOIs
Publication statusPublished - 27 Nov 2019

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