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Cited by 359

The DOI matches its Crossref record; 77 of the 77 references it cites were found in a registry or an index.

Metal–Organic Framework Based Hydrogen-Bonding Nanotrap for Efficient Acetylene Storage and Separation

Open access
Ye, Yingxiang, Xian, Shikai, Cui, Hui, Tan, Kui, Gong, Lingshan, Liang, Bin, Pham, Tony, Pandey, Haardik, Krishna, Rajamani, Lan, Pui Ching, Forrest, Katherine A., Space, Brian, Thonhauser, Timo, Li, Jing, Ma, Shengqian·2022·Journal of the American Chemical Society

Abstract

The removal of carbon dioxide (CO 2 ) from acetylene (C 2 H 2 ) is a critical industrial process for manufacturing high-purity C 2 H 2 . However, it remains challenging to address the tradeoff between adsorption capacity and selectivity, on account of their similar physical properties and molecular sizes. To overcome this difficulty, here we report a novel strategy involving the regulation of a hydrogen-bonding nanotrap on the pore surface to promote the separation of C 2 H 2 /CO 2 mixtures in three isostructural metal–organic frameworks (MOFs, named MIL-160, CAU-10H, and CAU-23, respectively). Among them, MIL-160, which has abundant hydrogen-bonding acceptors as nanotraps, can selectively capture acetylene molecules and demonstrates an ultrahigh C 2 H 2 storage capacity (191 cm 3 g –1, or 213 cm 3 cm –3 ) but much less CO 2 uptake (90 cm 3 g –1 ) under ambient conditions. The C 2 H 2 adsorption amount of MIL-160 is remarkably higher than those for the other two isostructural MOFs (86 and 119 cm 3 g –1 for CAU-10H and CAU-23, respectively) under the same conditions. More importantly, both simulation and experimental breakthrough results show that MIL-160 sets a new benchmark for equimolar C 2 H 2 /CO 2 separation in terms of the separation potential (Δ q break = 5.02 mol/kg) and C 2 H 2 productivity (6.8 mol/kg). In addition, in situ FT-IR experiments and computational modeling further reveal that the unique host–guest multiple hydrogen-bonding interaction between the nanotrap and C 2 H 2 is the key factor for achieving the extraordinary acetylene storage capacity and superior C 2 H 2 /CO 2 selectivity. This work provides a novel and powerful approach to address the tradeoff of this extremely challenging gas separation.

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Crossref · 10.1021/jacs.1c10620

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Authors
Ye, Y., Xian, S., Cui, H., Tan, K., Gong, L., Liang, B., Pham, T., Pandey, H., Krishna, R., Lan, P. C., Forrest, K. A., Space, B., Thonhauser, T., Li, J., & Ma, S.
Venue
Journal of the American Chemical Society
Published
2021-12-29
Volume
144
Issue
4
Pages
1681-1689
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W4200219264
Cited by
359
References
77
FWCI
18.43
Type
journal article
Language
en
Open access
green

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