Articles

Document Type: Journal article (JA)
Title: Highly rapid mechanochemical synthesis of a pillar-layer metal-organic framework for efficient CH4/N2 separation
Author: Chen, Yongwei (1); Wu, Houxiao (1); Yuan, Yinuo (1); Lv, Daofei (1); Qiao, Zhiwei (2); An, Dongli (3); Wu, Xuanjun (4); Liang, Hong (2); Li, Zhong (1); Xia, Qibin (1, 5)
作者单位: (1) School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou; 510640, China (2) Guangzhou Key Laboratory for New Energy and Green Catalysis, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou; 510006, China (3) College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361000, China (4) School of Chemistry, Chemical Engineering & Life Sciences, Wuhan University of Technology, Wuhan; 430070, China (5) Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou; 510640, China
RPAddress: South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China.
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Journal: Chemical Engineering Journal
Publisher: Elsevier B.V.
ISSN: 1385-8947
Published: 2020-04-01, 385 ():-.
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Fund_Code: National Natural Science Foundation of ChinaNational Natural Science Foundation of China [21878101, 21576092, 21676094, 21576058]
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Keywords: Gas adsorption; Grinding (machining); Molecules; Organometallics
Abstract: Efficient capture of methane (CH4) from nitrogen (N2) by adsorption separation remains a challenge. In this work, we demonstrate the first solvent-free mechanochemical synthesis of a zinc-based pillar-layer MOF Zn2(5-aip)2(bpy) (1) within minutes, making 1 accessible via a rapid and green route. By rational control of grinding time, the resulting product of 1–4 (which stands for grinding 4 min) has the optimal porosity confirmed by using CO2 as the probe gas. For the recovery of CH4 from N2 at 5.0 bar and 298 K, the adsorption uptakes of CH4 and N2 for 1–4 are 1.10 and 0.27 mmol/g, exhibiting preferential adsorption CH4 over N2 with high CH4/N2 selectivity of 7.0. The high selectivity of CH4/N2 in 1–4 is mainly ascribed to the difference in affinity interactions between the pore walls and gas molecules, confirmed by experimental adsorption heat and molecular simulation. Two CH4 molecules can enter in the same pores, but most of the pores can only adsorb one N2 molecule. Furthermore, the dynamic separation performance for CH4/N2 mixture in 1–4 is verified by simulated breakthrough curves. The unprecedentedly rapid solvent-free mechanochemical synthesis within minutes makes 1 easily accessible at the gram scale via an environmentally friendly method for accelerating potential application of CH4/N2 separation. ? 2019 Elsevier B.V.
WOS Categories: Engineering, Environmental; Engineering, Chemical
Accession Number: WOS:000507465200071
EI收录号: 20195107877487
DOI: 10.1016/j.cej.2019.123836
ESI_Type: ENGINEERING
Collection: SCIE, EI

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