Characterisation of metal organic frameworks for adsorption cooling

Ahmed Rezk, Raya Al-Dadah*, Saad Mahmoud, Ahmed Elsayed

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Silica gel/water adsorption cooling systems suffer from size, performance and cost limitations. Therefore, there is a need for new adsorbent materials that outperform silica gel. Metal organic frameworks (MOFs) are new micro-porous materials that have extraordinary porosity and uniform structure. Due to the lack of published data that characterise MOF/water adsorption, this paper experimentally investigates the adsorption characteristics of HKUST-1 (Cu-BTC (copper benzene-1,3,5-tricarboxylate), C 18H 6Cu 3O 12) and MIL-100 (Fe-BTC (Iron 1,3,5- benzenetricarboxylate), C 9H 3FeO 6) MOFs compared to silica gel RD-2060. The adsorption characteristics of Silica gel RD-2060, HKUST-1 and MIL-100 were determined using an advanced gravimetric dynamic vapour sorption analyser (DVS). Results showed that HKUST-1 performed better than silica gel RD-2060 with an increase of water uptake of 93.2%, which could lead to a considerable increase in refrigerant flow rate, cooling capacity and/or reducing the size of the adsorption system. However, MIL-100 MOF showed reduced water uptake comparable to silica gel RD-2060 for water chilling applications with evaporation at 5 0C. These results highlight the potential of using MOF materials to improve the efficiency of water adsorption cooling systems.

Original languageEnglish
Pages (from-to)7366-7374
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number25-26
DOIs
Publication statusPublished - 1 Dec 2012

Bibliographical note

© 2012 Elsevier Ltd. Open access under CC BY licence

Keywords

  • Adsorption cooling
  • HKUST-1
  • Metal organic frameworks
  • MIL-100
  • Silica gel RD-2060/water

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