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Pore-Space-Partition-Enabled Exceptional Ethane Uptake and Ethane-Selective Ethane–Ethylene Separation
Open accessAbstract
An ideal material for C 2 H 6 /C 2 H 4 separation would simultaneously have the highest C 2 H 6 uptake capacity and the highest C 2 H 6 /C 2 H 4 selectivity. But such material is elusive. A benchmark material for ethane-selective C 2 H 6 /C 2 H 4 separation is peroxo-functionalized MOF-74-Fe that exhibits the best known separation performance due to its high C 2 H 6 /C 2 H 4 selectivity (4.4), although its C 2 H 6 uptake capacity is moderate (74.3 cm 3 /g). Here, we report a family of pore-space-partitioned crystalline porous materials (CPMs) with exceptional C 2 H 6 uptake capacity and C 2 H 6 /C 2 H 4 separation potential (i.e., C 2 H 4 recovered from the mixture) despite their moderate C 2 H 6 /C 2 H 4 selectivity (up to 1.75). The ethane uptake capacity as high as 166.8 cm 3 /g at 1 atm and 298 K, more than twice that of peroxo-MOF-74-Fe, has been achieved even though the isosteric heat of adsorption (21.9–30.4 kJ/mol) for these CPMs is as low as about one-third of that for peroxo-MOF-74-Fe (66.8 kJ/mol). While the overall C 2 H 6 /C 2 H 4 separation potentials have not yet surpassed peroxo-MOF-74-Fe, these robust CPMs exhibit outstanding properties including high thermal stability (up to 450 °C) and aqueous stability, low regeneration energy, and a high degree of chemical and geometrical tunability within the same isoreticular framework.
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Cited by
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Optimizing Pore Space for Flexible-Robust Metal–Organic Framework to Boost Trace Acetylene Removal
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Metadata
- Authors
- Yang, H., Wang, Y., Krishna, R., Jia, X., Wang, Y., Hong, A. N., Dang, C., Castillo, H. E., Bu, X., & Feng, P.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-01-27
- Volume
- 142
- Issue
- 5
- Pages
- 2222-2227
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W3004356871
- Cited by
- 328
- References
- 50
- FWCI
- 28.76
- Type
- journal article
- Language
- en
- Open access
- green
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- Yang, H., Wang, Y., Krishna, R., Jia, X., Wang, Y., Hong, A. N., Dang, C., Castillo, H. E., Bu, X., & Feng, P. (2020). Pore-Space-Partition-Enabled Exceptional Ethane Uptake and Ethane-Selective Ethane–Ethylene Separation. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.9b12924
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