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Efficient separation of 1,3-butadiene from C4 hydrocarbons by flexible metal-organic framework with gate-opening effect
  • +4
  • Wang Lu,
  • Hongliang Huang,
  • Zhu Hejin,
  • Chang Yanjiao,
  • Guo Xiangyu,
  • Yang Fan,
  • Chongli Zhong
Wang Lu
Tiangong University
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Hongliang Huang
Tiangong University
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Zhu Hejin
Tiangong University
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Chang Yanjiao
Tiangong University
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Guo Xiangyu
Tiangong University
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Yang Fan
Tiangong University
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Chongli Zhong
Tiangong University
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Abstract

Efficient and economical separation of 1,3-butadiene (C4H6) from C4 hydrocarbons is imperative yet challenging in industrial separation processes. Herein, a guest-induced flexible Mn-bpdc MOF has been employed to separate C4H6 from C4 hydrocarbons, including n-butene (n-C4H8), iso-butene (iso-C4H8), n-butane (n-C4H10) and iso-butane (iso-C4H10). Significantly, C4H6 can instantaneously induce gate-opening of Mn-bpdc MOF at 0.13 bar and 298 K, thus significant amounts of C4H6 can be adsorbed, while other C4 hydrocarbons cannot induce the gate-opening even at 1 bar. The uptake selectivities of Mn-bpdc MOF for C4H6/n-C4H8 and C4H6/iso-C4H8 are up to 40.0 and 45.0 at 298 K and 1 bar, respectively, both surpassing all the reported adsorbents. In addition, breakthrough experiments verified that C4H6/n-C4H8, C4H6/iso-C4H8, C4H6/n-C4H10 and C4H6/iso-C4H10 mixture can be efficiently separated. More importantly, Mn-bpdc possesses excellent water stability and outstanding regeneration ability for C4H6 separation, making it a new benchmark for C4H6 purification.

Peer review status:IN REVISION

31 May 2021Submitted to AIChE Journal
01 Jun 2021Assigned to Editor
01 Jun 2021Submission Checks Completed
13 Jun 2021Reviewer(s) Assigned
14 Sep 2021Editorial Decision: Revise Major