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dc.contributor.authorYang, X.
dc.contributor.authorArami-Niya, Arash
dc.contributor.authorXiao, G.
dc.contributor.authorMay, E.F.
dc.date.accessioned2021-01-28T02:07:08Z
dc.date.available2021-01-28T02:07:08Z
dc.date.issued2020
dc.identifier.citationYang, X. and Arami-Niya, A. and Xiao, G. and May, E.F. 2020. Flexible Adsorbents at High Pressure: Observations and Correlation of ZIF-7 Stepped Sorption Isotherms for Nitrogen, Argon, and Other Gases. Langmuir. 36 (49): pp. 14967-14977.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/82396
dc.identifier.doi10.1021/acs.langmuir.0c02279
dc.description.abstract

© 2020 American Chemical Society. Stepped adsorption isotherms with desorption hysteresis were measured for nitrogen, argon, ethane, carbon dioxide, and methane at pressures up to 17 MPa on zeolitic imidazolate framework-7 (ZIF-7) using a gravimetric sorption analyzer. Such stepped sorption isotherms have not been previously reported for nitrogen or argon on ZIF-7, and required the application of pressures as high as 15 MPa to trigger the ZIF-7 structural phase transition at temperatures around 360 K. The stepped hysteretic sorption isotherms measured for carbon dioxide, methane, and ethane were consistent with previous observations reported in the literature. To correlate these stepped hysteretic sorption isotherms, a semi-empirical model was developed by combining a three-parameter Langmuir equation to describe the Type I aspect of the isotherm, with a model designed to describe the temperature-dependent ZIF-7 structural phase transition. Excellent fits of the combined adsorption and desorption branches were achieved by adjusting nine parameters in the temperature-dependent model, with root-mean-square deviations within 2.5 % of the highest measured adsorption capacity. Each parameter of the new semi-empirical model has a physical basis, allowing them to be estimated or compared independently.

dc.languageEnglish
dc.publisherAMER CHEMICAL SOC
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DP190100983
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/IC150100019
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectTechnology
dc.subjectChemistry, Multidisciplinary
dc.subjectChemistry, Physical
dc.subjectMaterials Science, Multidisciplinary
dc.subjectChemistry
dc.subjectMaterials Science
dc.subjectMETAL-ORGANIC FRAMEWORK
dc.subjectEQUATION-OF-STATE
dc.subjectCARBON-DIOXIDE
dc.subjectTHERMAL-EXPANSION
dc.subjectMELTING LINE
dc.subjectTHERMODYNAMIC PROPERTIES
dc.subjectSTRUCTURAL TRANSITIONS
dc.subjectADSORPTION EQUILIBRIUM
dc.subjectFLUID REGION
dc.subjectDEW POINTS
dc.titleFlexible Adsorbents at High Pressure: Observations and Correlation of ZIF-7 Stepped Sorption Isotherms for Nitrogen, Argon, and Other Gases
dc.typeJournal Article
dcterms.source.volume36
dcterms.source.number49
dcterms.source.startPage14967
dcterms.source.endPage14977
dcterms.source.issn0743-7463
dcterms.source.titleLangmuir
dc.date.updated2021-01-28T02:07:07Z
curtin.departmentWASM: Minerals, Energy and Chemical Engineering
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidArami-Niya, Arash [0000-0001-6450-0774]
dcterms.source.eissn1520-5827
curtin.contributor.scopusauthoridArami-Niya, Arash [36468096400]
dc.date.embargoEnd2021-12-02


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