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Efficient SF6 capture and separation in robust gallium- and vanadium-based metal–organic frameworks.
- Source :
- Journal of Materials Chemistry A; 12/28/2023, Vol. 11 Issue 48, p26435-26441, 7p
- Publication Year :
- 2023
-
Abstract
- Sulfur hexafluoride (SF<subscript>6</subscript>) is a highly potent greenhouse gas (GHG) that is mainly emitted from high-voltage electrical applications. The global warming potential (GWP) of the gas is almost 23 000 times that of CO<subscript>2</subscript> and therefore, controlling its emission and recovery is of great importance from both an environmental and economic perspective. Solid adsorbents and adsorption-based technology is a cost-effective and energy-efficient pathway to recapture SF<subscript>6</subscript> from its sources, which usually consist of dilute SF<subscript>6</subscript> in N<subscript>2</subscript>. Here, we present a group of four highly porous and robust gallium- or vanadium-based metal–organic frameworks (MOFs) with exceptional SF<subscript>6</subscript> uptake and selectivity. In particular, the novel gallium 1,2,4,5-tetrakis(4-carboxlatephenyl)benzene (TCPB<superscript>4−</superscript>) MOF (Ga-TBAPy) possesses 1-dimensional channels of suitable size (5.2 × 8.4 Å and 5.3 × 10 Å) to adsorb up to 2.25 mmol g<superscript>−1</superscript> of SF<subscript>6</subscript> at 10 kPa with an excellent SF<subscript>6</subscript>-over-N<subscript>2</subscript> selectivity of 418. Ga-TCPB also exhibits high chemical stability in aqueous and acidic media as well as in organic solvents. 3D electron diffraction (3D ED) patterns combined with high-resolution electron microscopy images were employed to investigate the structure of these water-stable and cyclable MOF SF<subscript>6</subscript> adsorbents. Furthermore, this study demonstrates the possibility of using these highly stable MOFs to capture SF<subscript>6</subscript> from a gas mixture as well as how MOFs can offer an alternative and efficient way to mitigate the global warming contributions from the emission of SF<subscript>6.</subscript> [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 11
- Issue :
- 48
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 174178601
- Full Text :
- https://doi.org/10.1039/d3ta05297d