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Pyrazine-interior-embodied MOF-74 for selective CO2 adsorption
  • +5
  • meng zhao,
  • Yujie Ban,
  • Ze Chang,
  • Yingwu Zhou,
  • Kun Yang,
  • Yuecheng Wang,
  • Na Cao,
  • Weishen Yang
meng zhao
Dalian Institute of Chemical Physics

Corresponding Author:zhaozh@dicp.ac.cn

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Yujie Ban
Dalian Institute of Chemical Physics
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Ze Chang
Nankai University
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Yingwu Zhou
Dalian Institute of Chemical Physics
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Kun Yang
Dalian Institute of Chemical Physics
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Yuecheng Wang
Dalian Institute of Chemical Physics
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Na Cao
Dalian Institute of Chemical Physics
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Weishen Yang
Dalian Institute of Chemical Physics
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Abstract

A series of pyrazine-interior-embodied MOF-74 composites (py-MOF-74) were successfully synthesized by a post vapor modification method, concomitant with the loading ratio of pyrazine easily controlled in this process. Here, pyrazine molecules perform as a cavity-occupant to block the wide pores of MOF-74, which accentuates the adsorption discrepancy of a pair of gases on MOFs and consequently reinforces the adsorption selectivity (typically for CO2/N2, CO2/CH4). Different from the “physical confinement” of occupants, pyrazine molecule with dual “para-nitrogen” atoms donates one N atom to bond with the open metal ion of MOF-74 for stability, and remains the other N atom available for potential CO2 trapping site. Pyrazine-interior-embodied MOF-74 composites manifest significantly improved CO2/N2 and CO2/CH4 adsorption selectivity. Typically, py-MOF-74c with ultimate pyrazine insertion displays selectivity greatly superior to MOF-74 in the equimolar CO2/CH4 (598 vs. 35) and the simulated CO2/N2 flue gas (471 vs. 49) at 100 kPa and 298 K.
15 Apr 2021Submitted to AIChE Journal
19 Apr 2021Submission Checks Completed
19 Apr 2021Assigned to Editor
03 May 2021Reviewer(s) Assigned
24 Sep 2021Editorial Decision: Revise Major
20 Oct 20211st Revision Received
29 Oct 2021Submission Checks Completed
29 Oct 2021Assigned to Editor
02 Nov 2021Reviewer(s) Assigned
10 Nov 2021Editorial Decision: Accept