Robust Ultramicroporous Metal–Organic Frameworks with Benchmark Affinity for Acetylene

Yun Lei Peng, Tony Pham, Pengfei Li, Ting Wang, Yao Chen, Kai Jie Chen, Katherine A. Forrest, Brian Space, Peng Cheng, Michael J. Zaworotko, Zhenjie Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

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: in situ 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.

Original languageEnglish
Pages (from-to)10971-10975
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number34
DOIs
Publication statusPublished - 20 Aug 2018

Keywords

  • acetylene
  • gas separation
  • hydrolytic stability
  • metal–organic frameworks
  • ultramicroporous materials

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