Interfacial growth strategy for synthesizing Mg-MOF-74@clinoptilolites with hierarchical structures for enhancing adsorptive separation performance of CO2/CH4, CH4/N2 and CO2/N2
{"title":"Interfacial growth strategy for synthesizing Mg-MOF-74@clinoptilolites with hierarchical structures for enhancing adsorptive separation performance of CO2/CH4, CH4/N2 and CO2/N2","authors":"","doi":"10.1016/j.surfin.2024.105106","DOIUrl":null,"url":null,"abstract":"<div><p>The purification and separation of CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub> from biogas, flue gas, and coalbed gas for carbon capture and storage are main technology in mitigating the greenhouse effect. The Mg-MOF-74@clinoptilolite (Mg-MOF-74@CP) composites are successfully synthesized through an interfacial growth of Mg-MOF-74 onto the surfaces of the synthesized CP for adsorption and separation of CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>. The structural characteristics of the resultant composites are systematically characterized by various characterizations. In particular, small-angle X-ray scattering (SAXS) patterns are used to elucidate the fractal structural evolutions of the parent CP, Mg-MOF-74, and Mg-MOF-74@CP. Meanwhile, the single-component adsorption isotherms for CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub> are demonstrated. The breakthrough measurements on CO<sub>2</sub>/CH<sub>4</sub> and cycling tests on CO<sub>2</sub> are conducted. The results elucidate that the CO<sub>2</sub> equilibrium capacity of Mg-MOF-74@CP is higher than that of parent CP, displaying a high affinity toward CO<sub>2</sub>, the longer breakthrough time and enhancement of CO<sub>2</sub> uptake exhibit a better separation performance. The cycling tests on CO<sub>2</sub> reveal that the Mg-MOF-74@CP could be used repetitively, promoting its practical application in an energy-saving and economical way. Additionally, the adsorption isotherms and adsorption sites of the prepared Mg-MOF-74@CP are simulated using the Grand Canonical Monte Carlo (GCMC) method, elucidating the mechanism of the gas separation performance of Mg-MOF-74@CP.</p></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surfaces and Interfaces","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468023024012628","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The purification and separation of CO2, CH4, and N2 from biogas, flue gas, and coalbed gas for carbon capture and storage are main technology in mitigating the greenhouse effect. The Mg-MOF-74@clinoptilolite (Mg-MOF-74@CP) composites are successfully synthesized through an interfacial growth of Mg-MOF-74 onto the surfaces of the synthesized CP for adsorption and separation of CO2, CH4, and N2. The structural characteristics of the resultant composites are systematically characterized by various characterizations. In particular, small-angle X-ray scattering (SAXS) patterns are used to elucidate the fractal structural evolutions of the parent CP, Mg-MOF-74, and Mg-MOF-74@CP. Meanwhile, the single-component adsorption isotherms for CO2, CH4, and N2 are demonstrated. The breakthrough measurements on CO2/CH4 and cycling tests on CO2 are conducted. The results elucidate that the CO2 equilibrium capacity of Mg-MOF-74@CP is higher than that of parent CP, displaying a high affinity toward CO2, the longer breakthrough time and enhancement of CO2 uptake exhibit a better separation performance. The cycling tests on CO2 reveal that the Mg-MOF-74@CP could be used repetitively, promoting its practical application in an energy-saving and economical way. Additionally, the adsorption isotherms and adsorption sites of the prepared Mg-MOF-74@CP are simulated using the Grand Canonical Monte Carlo (GCMC) method, elucidating the mechanism of the gas separation performance of Mg-MOF-74@CP.
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The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results.
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