期刊
CHEMISTRY OF MATERIALS
卷 28, 期 6, 页码 1636-1646出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.5b03792
关键词
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资金
- National Science Foundation [DMR-1231586]
- NSF [CHE-0840483]
- National Science Foundation/Department of Energy [NSF/CHE-0822838]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357, DE-FG02-08ER46491]
- KAUST [URF/1/1672-01-01]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1346572] Funding Source: National Science Foundation
The adsorption mechanism of ethane, ethylene, and acetylene (C2Hn = 2, 4, 6) on two microporous metal organic frameworks (MOFs) is described here that is consistent with observations from single crystal and powder X-ray diffraction, calorimetric measurements, and gas adsorption isotherm measurements. Two calcium-based MOFs, designated as SBMOF-1 and SBMOF-2 (SB: Stony Brook), form three-dimensional frameworks with one-dimensional open channels. As determined from single crystal diffraction experiments, channel geometries of both SBMOF-1 and SBMOF-2 provide multiple adsorption sites for hydrocarbon molecules through C-H-pi and C-H center dot center dot center dot interactions, similarly to interactions in the molecular and protein crystals. Both materials selectively adsorb C-2 hydrocarbon gases over methane as determined with LAST and breakthrough calculations as well as experimental breakthrough measurements, with C2H6/CH4 selectivity as high as 74 in SBMOF-1.
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