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MOFs as adsorbents for low temperature heating and cooling applications
Stefan K Henninger1, Hesham A Habib, Christoph Janiak
1Thermal Systems and Buildings, Fraunhofer-Institut Solare Energiesysteme ISE, Heidenhofstr. 2, 79110 Freiburg, Germany. stefan.henninger@ise.fraunhofer.de
Journal of the American Chemical Society
|February 12, 2009
Summary
A novel metal-organic framework (MOF) demonstrates reversible water adsorption, making it a promising candidate for efficient solid adsorbent heat transformation cycles.
Area of Science:
- Materials Science
- Chemistry
- Engineering
Background:
- Metal-organic frameworks (MOFs) are porous crystalline materials with tunable properties.
- Water stability and adsorption capacity are key factors for MOFs in thermal applications.
Purpose of the Study:
- To investigate the water adsorption properties of a novel 3D Ni-based MOF.
- To evaluate its potential as a solid adsorbent for heat transformation cycles.
Main Methods:
- Synthesis and characterization of the 3D MOF: {[Ni(3)(mu(3)-btc)(2)(mu(4)-btre)(2)(mu-H(2)O)(2)]. approximately 22H(2)O}.
- Reversible dehydration-hydration cycling experiments to assess water uptake and release.
Main Results:
- The synthesized MOF exhibits excellent water stability.
- A significant loading spread of 210 g/kg was achieved, indicating high water adsorption capacity.
- The material demonstrated reversible dehydration-hydration behavior.
Conclusions:
- The 3D Ni-MOF is a water-stable material suitable for thermal energy applications.
- Its high water loading capacity makes it a strong candidate for solid adsorbents in refrigeration, heat pumping, and heat storage systems.
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