通过孔隙几何拟合设计的金属有机框架从裂解气中直接提纯乙烯

Yang Chen; Zhenduo Wu; Longlong Fan; Rajamani Krishna; Hongliang Huang; Yi Wang; Qizhao Xiong; Jinping Li; Libo Li

doi:10.1016/j.eng.2024.01.024

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工程（英文） ›› 2024, Vol. 41 ›› Issue (10) : 84-92. DOI: 10.1016/j.eng.2024.01.024

研究论文

Article

通过孔隙几何拟合设计的金属有机框架从裂解气中直接提纯乙烯

Yang Chen ^a ,
Zhenduo Wu ^b^,^f ,
Longlong Fan ^c ,
Rajamani Krishna ^d ,
Hongliang Huang ^e ,
Yi Wang ^a ,
Qizhao Xiong ^a ,
Jinping Li ^a^,^* ,
Libo Li ^a^,^*

作者信息 +

Direct Ethylene Purification from Cracking Gas via a Metal-Organic Framework Through Pore Geometry Fitting

Yang Chen ^a^,^# ,
Zhenduo Wu ^b^,^f^,^# ,
Longlong Fan ^c^,^# ,
Rajamani Krishna ^d ,
Hongliang Huang ^e ,
Yi Wang ^a ,
Qizhao Xiong ^a ,
Jinping Li ^a^,^* ,
Libo Li ^a^,^*

Author information +

History +

Abstract

The direct one-step separation of polymer-grade C₂H₄ from complex light hydrocarbon mixtures has high industrial significance but is very challenging. Herein, an ethylene-adsorption-weakening strategy is applied for precise regulation of the pore geometry of four tailor-made metal-organic frameworks (MOFs) with pillar-layered structures, dubbed TYUT-10/11/12/13. Based on its pore geometry design and functional group regulation, TYUT-12 exhibits exceptional selective adsorption selectivity toward C₃H₈, C₃H₆, C₂H₆, C₂H₂, and CO₂ over C₂H₄; its C₂H₆/C₂H₄ adsorption selectivity reaches 4.56, surpassing the record value of 4.4 by Fe₂(O₂)(dobdc) (dobdc⁴⁻ = 2,5-dioxido-1,4-benzenedicarboxylate). The weak π-π stacking binding affinity toward C₂H₄ in TYUT-12 is clearly demonstrated through a combination of neutron powder diffraction measurements and theoretical calculations. Breakthrough experiments demonstrate that C₂H₄ can be directly obtained from binary, ternary, quaternary, and six-component light hydrocarbon mixtures with over 99.95% purity.

Keywords

Metal-organic frameworks / Pore regulation / Adsorptive separation / One-step purification / C₂H₄ purification

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Yang Chen, Zhenduo Wu, Longlong Fan. 通过孔隙几何拟合设计的金属有机框架从裂解气中直接提纯乙烯. Engineering. 2024, 41(10): 84-92 https://doi.org/10.1016/j.eng.2024.01.024

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