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A highly stable metal-organic framework with well-matched pore cavity for efficient acetylene separation
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  • Yang Chen,
  • Yadan Du,
  • Yong Wang,
  • Rajamani Krishna,
  • Libo Li,
  • Jiangfeng Yang,
  • jinping Li,
  • Bin Mu
Yang Chen
Taiyuan University of Technology
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Yadan Du
Taiyuan University of Technology
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Yong Wang
Taiyuan University of Technology
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Rajamani Krishna
University of Amsterdam
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Libo Li
Taiyuan University of Technology
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Jiangfeng Yang
Taiyuan University of Technology
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jinping Li
Taiyuan University of Technology
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Bin Mu
Arizona State University
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Peer review status:UNDER REVIEW

29 Jun 2020Submitted to AIChE Journal
06 Jul 2020Assigned to Editor
06 Jul 2020Submission Checks Completed
08 Jul 2020Reviewer(s) Assigned

Abstract

Acetylene, an important petrochemical feedstock, is the starting chemical to produce many polymer products. Separating C2H2 from its by-product mixtures is still an energy-consuming process and remains challenging. Here, we present a metal-organic framework[Zn2(bpy)(btec)], with a desirable pore geometry and highly stable framework, which demonstrated a high separation performance of C2H2 from simulated mixtures. With the desirable pore dimension and hydrogen bonding sites, Zn2(bpy)(btec) shows by far the both highest C2H2/CO2 and C2H2/CO2 uptake ratios, very high adsorption selectivities and moderately C2H2 uptake of 93.5 cm3•cm−3 under 298 K and 1 atm. Not only straightforwardly produced high purity of C2H4, but also recovered high purity of C2H2 (>98%) in the regeneration process (>92% recovery). More notably, Zn2(bpy)(btec) can be straightforwardly synthesized at a large scale under environmentally friendly conditions, and its good water/chemical stability, thermostability, and cyclic stability highlight the promise of this molecular sieving material for industrial C2H2 separation.