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Advancement of sorption-based heat transformation by a metal coating of highly-stable, hydrophilic aluminium fumarate MOF

: Jeremias, F.; Fröhlich, D.; Janiak, C.; Henninger, S.K.


RSC Advances 4 (2014), No.46, pp.24073-24082
ISSN: 2046-2069
Journal Article
Fraunhofer ISE ()
Thermische Anlagen und Gebäudetechnik; energieeffizientes Gebäude; Speichertechnologie; Elektrische und thermische Wärmepumpen; Wärmeübertragung in gebäudetechnischen Anlagen; Kühlung und Klimatisierung von Gebäuden; Kältespeicher; driven chiller; heat pump; MOF; stability; fumarate

The distinctive water sorption properties of microporous aluminium fumarate (s-shaped isotherm{,} narrow hysteresis{,} loading >0.3 g g-1 at a relative pressure as low as p/p0 = 0.3 under realistic working conditions) permit a large advancement of MOF-based sorption heat transformation processes{,} especially as we demonstrate that the favourable sorption properties are accompanied by an unprecedented cyclic hydrothermal stability. With regard to the application of heat transformation{,} where unhindered heat and mass transfer are crucial for fast ad-/desorption cycles and a high power density{,} the question of proper shaping was also addressed. A 300 [small mu ]m thick{,} polycrystalline{,} thermally well coupled and highly accessible coating of microporous aluminium fumarate was deposited on a metal substrate via the thermal gradient approach{,} and found to be stable for the first 4500 ad-/desorption cycles with water vapour.