Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 34, Pages 10971-10975Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201806732
Keywords
acetylene; gas separation; hydrolytic stability; metal-organic frameworks; ultramicroporous materials
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Funding
- National Natural Science Foundation of China [21601093]
- Science Foundation Ireland [13/RP/B2549, 16/IA/4624]
- National Science Foundation of US [DMR-1607989, CHE-1531590]
- XSEDE Grant of US [TG-DMR090028]
- American Chemical Society Petroleum Research Fund grant [ACS PRF 56673-ND6]
- Direct For Mathematical & Physical Scien [1531590] Funding Source: National Science Foundation
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Highly selective separation and/or purification of acetylene from various gas mixtures is a relevant and difficult challenge that currently requires costly and energy-intensive chemisorption processes. Two ultramicroporous metal-organic framework physisorbents, NKMOF-1-M (M=Cu or Ni), offer high hydrolytic stability and benchmark selectivity towards acetylene versus several gases at ambient temperature. The performance of NKMOF-1-M is attributed to their exceptional acetylene binding affinity as revealed by modelling and several experimental studies: insitu single-crystal X-ray diffraction, FTIR, and gas mixture breakthrough tests. NKMOF-1-M exhibit better low-pressure uptake than existing physisorbents and possesses the highest selectivities yet reported for C2H2/CO2 and C2H2/CH4. The performance of NKMOF-1-M is not driven by the same mechanism as current benchmark physisorbents that rely on pore walls lined by inorganic anions.
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