Robust Microporous Metal–Organic Frameworks for Highly Efficient and Simultaneous Removal of Propyne and Propadiene from Propylene

Yun Lei Peng, Chaohui He, Tony Pham, Ting Wang, Pengfei Li, Rajamani Krishna, Katherine A. Forrest, Adam Hogan, Shanelle Suepaul, Brian Space, Ming Fang, Yao Chen, Michael J. Zaworotko, Jinping Li, Libo Li, Zhenjie Zhang, Peng Cheng, Banglin Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Simultaneous removal of trace amounts of propyne and propadiene from propylene is an important but challenging industrial process. We report herein a class of microporous metal–organic frameworks (NKMOF-1-M) with exceptional water stability and remarkably high uptakes for both propyne and propadiene at low pressures. NKMOF-1-M separated a ternary propyne/propadiene/propylene (0.5 : 0.5 : 99.0) mixture with the highest reported selectivity for the production of polymer-grade propylene (99.996 %) at ambient temperature, as attributed to its strong binding affinity for propyne and propadiene over propylene. Moreover, we were able to visualize propyne and propadiene molecules in the single-crystal structure of NKMOF-1-M through a convenient approach under ambient conditions, which helped to precisely understand the binding sites and affinity for propyne and propadiene. These results provide important guidance on using ultramicroporous MOFs as physisorbent materials.

Original languageEnglish
Pages (from-to)10209-10214
Number of pages6
JournalAngewandte Chemie - International Edition
Volume58
Issue number30
DOIs
Publication statusPublished - 22 Jul 2019

Keywords

  • binding sites
  • gas separation
  • metal–organic frameworks
  • physisorption
  • propylene purification

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