Cyclic adsorption of water vapour on CuBTC MOF: Sustaining the hydrothermal stability under non-equilibrium conditions

Nadeen Al-Janabi, Vladimir Martis, Nektaria Servi, Flor R. Siperstein, Xiaolei Fan

Research output: Journal PublicationArticlepeer-review

29 Citations (Scopus)

Abstract

Metal organic frameworks (MOFs) based adsorption processes for gas separation from humid streams are limited by the hydrothermal stability of MOFs. This work presents a comprehensive study of the hydrothermal stability of CuBTC (BTC = benzene-1,3,5-tricarboxylate) MOF when exposed to humid streams in cyclic operations. We show that water uptake is slow, and that adsorption processes will most likely operate under non-equilibrium conditions. CuBTC does not show signs of decomposition when exposed to low water concentration and room temperature (up to water partial pressures of 6 mbar and 25 °C) for up to 48 h of cyclic operation. Nevertheless, short cycles (of less than 15 min per pressure stage) are required when exposed to high water vapour content (up to 70 mbar, 50 °C). This work demonstrates the need of tailoring the length of water exposure to avoid the equilibrium adsorption of water vapour on CuBTC and maintain the adsorbent integrity.

Original languageEnglish
Pages (from-to)594-602
Number of pages9
JournalChemical Engineering Journal
Volume333
DOIs
Publication statusPublished - 1 Feb 2018
Externally publishedYes

Keywords

  • CuBTC
  • Cyclic adsorption
  • Hydrothermal stability
  • Metal-organic frameworks (MOFs)
  • Non-equilibrium adsorption
  • Water vapour adsorption

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering

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