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Synergized oxygen vacancies with Mn2O3@CeO2 heterojunction as high current density catalysts for Li–O2 batteries
Renshu Huang, Jinli Chen, Xingfa Chen, Tianqi Yu, Huyi Yu, Kaien Li, Bin Li*, Shibin Yin* Submit a Manuscript
Fluorinated metal-organic framework for methane purification from a ternary CH4/C2H6/C3H8 mixture

Ke-Ai Zhou, Lian Huang, Xing-Ping Fu, Li-Ling Zhang, Yu-Ling Wang, Qing-Yan Liu*

Chin. J. Struct. Chem., 2023, 42: 100171. DOI: 10.1016/j.cjsc.2023.100172

November 15, 2023

Gases separation; Propane and ethane adsorption; Fluorinated MOF; Crystal structure; Natural gas purification

ABSTRACT

Herein we present a fluorinated metal-organic framework of {(Me2NH2)[Ni33-OH)(CF3-BPDC-CF3)3(tpt)]}n (1) constructed from 2,2'-bis(trifluoromethyl)biphenyl-4,4'-dicarboxylic (CF3-BPDC-CF32‒) and 2,4,6-tri(4-pyridyl)-1,3,5-triazine (tpt) ligands, which is developed for separating propane (C3H8) and ethane (C2H6) from natural gas. Compound 1 preferentially adsorbs C3H8 and C2H6 over CH4 demonstrated by gas adsorption experiments. The presence of trifluoromethyl groups on the biphenyl-4,4'-dicarboxylic ligands facilitates the highly polarized micropore environments for compound 1, thus providing suitable micorpores for capturing the C3H8 and C2H6 molecules with larger polarizabilities and sizes compared to CH4 molecule. The dynamic mixture breakthrough experiments showed that compound 1 can separate C3H8 and C2H6 from the ternary CH4/C2H6/C3H8 mixtures efficiently, endowing compound 1 with excellent methane purification ability.

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