Microporous metal organic framework [M2(hfipbb) 2(ted)] (M=Zn, Co; H2hfipbb=4,4-(hexafluoroisopropylidene) -bis(benzoic acid); Ted=triethylenediamine): Synthesis, structure analysis, pore characterization, small gas adsorption and CO2/N2 separation properties

William W. Xu, Sanhita Pramanik, Zhijuan Zhang, Thomas Emge, Jing Li

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Abstract

Carbon dioxide is a greenhouse gas that is a major contributor to global warming. Developing methods that can effectively capture CO2 is the key to reduce its emission to the atmosphere. Recent research shows that microporous metal organic frameworks (MOFs) are emerging as a promising family of adsorbents that may be promising for use in adsorption based capture and separation of CO2 from power plant waste gases. In this work we report the synthesis, crystal structure analysis and pore characterization of two microporous MOF structures, [M2(hfipbb)2(ted)] (M=Zn (1), Co (2); H2hfipbb=4,4-(hexafluoroisopropylidene)-bis(benzoic acid); ted=triethylenediamine). The CO2 and N2 adsorption experiments and IAST calculations are carried out on [Zn2(hfipbb) 2(ted)] under conditions that mimic post-combustion flue gas mixtures emitted from power plants. The results show that the framework interacts with CO2 strongly, giving rise to relatively high isosteric heats of adsorption (up to 28 kJ/mol), and high adsorption selectivity for CO2 over N2, making it promising for capturing and separating CO 2 from CO2/N2 mixtures.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalJournal of Solid State Chemistry
Volume200
DOIs
Publication statusPublished - Apr 1 2013

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Keywords

  • CO capture and separation
  • Ideal adsorbed solution theory
  • Isosteric heat of adsorption
  • Metal organic framework
  • Microporosity
  • Small gas adsorption

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