Engineering nano-trap distribution in metal-organic frameworks enables boost of SF_(6)/N_(2) separationOA
Separating/capturing SF_(6),having the strongest global warming potential,from exhaust gas with low concentration(1%–10%)in the power industry is significant for both greenhouse gas emission control and SF_(6) recycling and reutilization.In this study,we achieved highly efficient SF_(6)/N_(2) separation under different SF_(6) concentrations(1% and 10%)using two homologous metal-organic frameworks,Ni-bpz and Zn-bpz.This outcome underscores the effectiveness of rational nano-traps distribution engineering for targeted separation applications.The molecular simulation suggests that an SF_(6) molecule interacts with a single nano-trap in Zn-bpz.At the same time,it is efficiently confined by two adjacent nano-traps in the parallel distribution of Ni-bpz.Consequently,exceptional SF_(6)/N_(2) selectivity for 1/99 and 10/90 mixtures have been respectively achieved in Ni-bpz(516,SF_(6)/N_(2)=1/99)and Zn-bpz(608,SF_(6)/N_(2)=10/90)at 298 K and 1 bar.In dynamic breakthrough experiments,Ni-bpz exhibits a record pure N_(2)(≥99.99%)productivity(1496 mL/g)for an SF_(6)/N_(2)(1/99)gas mixture.Moreover,both MOFs demonstrate excellent water resistance across multiple cycles,suggesting their high promise for practical application.
Yan-Long Zhao;Yabo Xie;Xin Zhang;Xiang-Yu Li;Xuefeng Bai;Jian-Rong Li
Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering,College of Materials Science&Engineering,Beijing University of Technology,Beijing,100124,ChinaBeijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering,College of Materials Science&Engineering,Beijing University of Technology,Beijing,100124,ChinaBeijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering,College of Materials Science&Engineering,Beijing University of Technology,Beijing,100124,ChinaBeijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering,College of Materials Science&Engineering,Beijing University of Technology,Beijing,100124,ChinaBeijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering,College of Materials Science&Engineering,Beijing University of Technology,Beijing,100124,ChinaBeijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering,College of Materials Science&Engineering,Beijing University of Technology,Beijing,100124,China
资源环境
Metal-organicframeworksGreenhouse gascaptureAdsorptive separationSulfurhexafluoride recovery
《Green Chemical Engineering》 2026 (2)
P.131-136,6
the financial support from the National Natural Science Foundation of China(Nos.22225803,22038001,22278011,and 22108007)the Beijing Natural Science Foundation(No.Z230023)the Beijing Nova Program(No.Z211100002121094).
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