Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 32, Issue 38, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202203745
Keywords
C; H-2; (4) purification; molecular trapping; shape- and size-dependent kinetic sieving; ternary mixtures; trap-and-flow channel crystals
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Funding
- National Natural Science Foundation of China [22171135, 22038006]
- Innovative Research Team Program by the Ministry of Education of China [IRT-17R54]
- Young and Middle-aged Academic Leader of Jiangsu Provincial Blue Project
- Cultivation Program for the Excellent Doctoral Dissertation of Nanjing Tech University
- KAKENHI from the Japan Society of the Promotion of Science (JSPS) [JP25000007, JP18H05262]
- State Key Laboratory of Materials-Orienxted Chemical Engineering [ZK201803]
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This study successfully synthesized a trap-and-flow channel crystal (NTU-67) for efficient purification of ethylene from multicomponent mixtures, demonstrating a new design philosophy for extending the application boundaries of porous coordination polymers.
Ethylene (C2H4) purification from multicomponent mixtures by physical adsorption presents a great challenge in the chemical industry. This work successfully uses the postsynthetic method of crystal transformation in boiling alkaline solution to synthesize a trap-and-flow channel crystal (namely NTU-67), the flow channel of which provides an effective shape- and size-dependent sieving path for linear molecules such as acetylene (C2H2) and carbon dioxide (CO2), while the adjacent channel possesses customized space for efficient molecular trapping. The three-bladed array of the nanospace enables the crystal to afford a record productivity of C2H4 (121.5 mL g(-1), >99.95%) from C2H2/CO2/C2H4 (1/9/90, v/v/v) mixtures in a single adsorption-desorption cycle under humid and dynamic conditions, even at a high temperature of 343 K and wide gas ratio. The molecular-level insight and mechanism of the cooperative role of the trap-and-flow channel, found computationally and observed experimentally, demonstrates a new design philosophy toward extending the application boundaries of porous coordination polymers to further challenging tasks.
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