Hierarchically Structured HKUST-1 Nanocrystals for Enhanced SF6 Capture and Recovery

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HKUST-1, an inexpensive metal organic framework possessing open metal sites, has a great potential for capture and recovery of SF6. In this work, the structural property of HKUST-1 was modified to yield a hierarchically structured HKUST-1 nanocrystal exhibiting a superior performance with higher SF6 uptake (4.98 mmol g(-1) at 25 degrees C and 1 bar), better SF6/N-2 selectivity (similar to 70 at 25 degrees C), faster SF6 adsorpton kinetics, and lower energy penalty for regeneration compared to those of bulk HKUST-1 crystal as well as those of conventional zeolite and porous carbon adsorbents. Higher surface area and the presence of mesoporosity to facilitate the transport of SF6 to active sites residing in microporous spaces were found to be key factors contributing to such enhancement. The outstanding potential utility of our HKUST-1 crystal in industrial applications was also validated with an idealized vacuum swing adsorption model.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-03
Language
English
Article Type
Article
Citation

JOURNAL OF PHYSICAL CHEMISTRY C, v.121, no.12, pp.6748 - 6755

ISSN
1932-7447
DOI
10.1021/acs.jpcc.7b00291
URI
http://hdl.handle.net/10203/262294
Appears in Collection
CBE-Journal Papers(저널논문)
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