Efficient adsorption separation of methane from C2-C3 hydrocarbons in a Co(Ⅱ)-nodes metal-organic framework

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外文摘要：Methane(CH4)as a substitute for other mineral fuels plays a crucial role in reducing energy consumption and preventing environmental pollution.The present study employs a solvothermal method to fabricate a porous framework Co-metal-organic framework(Co-MOF)containing two distinct secondary building units(SBUs):an anionic[Co2(μ2-OH)(COO)4(H2O)]and a neutral[CoN2(COO)2].Notably,within the anionic SBUs,the coordinated water molecules induce the generation of divergent unsaturated Co(Ⅱ)centers in the unidirectional porous channels,thereby creating open metal sites.The adsorption per-formance of Co-MOF towards pure component gases was systematically investigated.The results demonstrated that Co-MOF exhibits superior adsorption capacity for C2-C3 hydrocarbons compared to CH4,which offers the potential for efficient adsorption and separation of CH4 from C2-C3 hydrocarbons.The gas selectivity separation ratios of Co-MOF for C2H6/CH4 and C3H8/CH4 were calculated using the ideal adsorbed solution theory method at 273/298 K and 0.1 MPa.The results revealed that Co-MOF achieved remarkable equilibrium separation selectivity for CH4 and C2-C3 hydrocarbon gases among non-modified MOFs,signifying the potential of the synthesized Co-MOF for efficient recovery and pu-rification of CH4 from C2-C3 hydrocarbons.Breakthrough experiments further demonstrate the ability of Co-MOF to purify methane from C2-C3 hydrocarbons in practical gas separation scenarios.Additionally,molecular simulation calculations further substantiate the propensity of anionic SBUs to interact with C2-C3 hydrocarbon compounds.This study provides a novel paradigm for the development of porous MOF materials in the application of gas mixture separation.

外文关键词：

Co-MOFSeparation hydrocarbonsDynamic breakthrough curvesMolecular simulations adsorbentMonte Carlo simulation

作者：

Jie Zhang、Xingzhe Guo、Bing Lin、Guangzu Xiong、Hanshuang Wang、Min Zhang、Liwen Fan、Bingwen Li、Shuisheng Chen

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作者单位：

Department of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China

Engineering Research Center of Oligosaccharides,Fuyang Normal University,Fuyang 236041,China

Shandong Key Laboratory of Biophysics,Institute of Biophysics,Dezhou University,Dezhou 253023,China

基金：

National Natural Science Foundation of ChinaNatural Science Foundation of Shanxi ProvinceScience and Technology Innovation Project of Colleges and Universities of Shanxi ProvinceNational Natural Science Foundation of Anhui ProvinceNational Natural Science Foundation of Anhui ProvinceNatural Science Foundation of Shandong ProvinceTalent Program Foundation of Dezhou University

项目编号：

214010992022030212123312022L5322008085MB32KJ2021ZD0073ZR2021QB1592021xjrc102

出版年：

2024

DOI：

10.1016/j.cjche.2024.02.001

中国化学工程学报(英文版)

中国化工学会

中国化学工程学报(英文版)

CSTPCDEI

影响因子：0.818

ISSN：1004-9541

年,卷(期)：2024.69(5)