Influence of Hydrogen Sulfide Exposure on the Transport and Structural Properties of the Metal–Organic Framework ZIF-8
- Univ. of Florida, Gainesville, FL (United States). Dept. of Chemical Engineering; Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
- Univ. of Wisconsin, Madison, WI (United States). Theoretical Chemistry Inst. Dept. of Chemistry
- Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical and Biomolecular Engineering
- Univ. of Florida, Gainesville, FL (United States). National High Magnetic Field Lab.
- Univ. of Florida, Gainesville, FL (United States). Dept. of Chemical Engineering
In this paper, the interaction between hydrogen sulfide and ZIF-8 was studied via structural characterizations and guest molecule diffusion measurements. It was found that hydrogen sulfide reacts with the ZIF-8 external particle surface to form a surface barrier that excludes the uptake of larger molecules (ethanol) and slows down the uptake of smaller molecules (carbon dioxide). Nonetheless, bulk transport properties were unaltered, as supported by pulsed field gradient nuclear magnetic resonance studies. Dispersion-corrected density functional theory calculations revealed that H2S is consumed by reactions occurring at the ZIF external surface. These reactions result in water and defect formation, both of which were found to be exothermic and independent of both crystallographic facets ({001} and {110}) and surface termination. Finally, we concluded that these surface reactions lead to structural and chemical changes to the ZIF-8 external surface that generate surface barriers to molecular transport.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME); Georgia Inst. of Technology, Atlanta, GA (United States); Univ. of Florida, Gainesville, FL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF) (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012577
- OSTI ID:
- 1428044
- Journal Information:
- Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 13 Vol. 122; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Ethane diffusion in mixed linker zeolitic imidazolate framework-7-8 by pulsed field gradient NMR in combination with single crystal IR microscopy
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journal | January 2018 |
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