Show simple item record

dc.contributor.authorArami-Niya, Arash
dc.contributor.authorBirkett, G.
dc.contributor.authorZhu, Z.
dc.contributor.authorRufford, T.E.
dc.date.accessioned2020-04-01T14:53:49Z
dc.date.available2020-04-01T14:53:49Z
dc.date.issued2017
dc.identifier.citationArami-Niya, A. and Birkett, G. and Zhu, Z. and Rufford, T.E. 2017. Gate opening effect of zeolitic imidazolate framework ZIF-7 for adsorption of CH4 and CO2 from N2. Journal of Materials Chemistry A. 5 (40): pp. 21389-21399.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/78458
dc.identifier.doi10.1039/c7ta03755d
dc.description.abstract

We report adsorption isotherms of CO2 and CH4 on the zeolitic imidazolate framework ZIF-7 that exhibit gate opening features associated with a flexible framework structure. This phenomenon has been reported by others for CO2 and light alkanes (e.g. ethane, ethylene, propane), but our study presents for first time experimental data to show that CH4 can also induce a gate opening effect in ZIF-7. Uptakes of CO2, CH4 and N2 on ZIF-7 were measured by a gravimetric adsorption apparatus at temperatures of 303-323 K and pressures up to 4494 kPa. From the CH4 isotherm measured at 303 K the transition pressure for the gate opening in ZIF-7 was estimated as 1245 kPa and the free-energy change associated with the structural phase change was 5.70 kJ mol-1. At an adsorption temperature of 303 K the phase transition pressure for CO2 in ZIF-F was 78 kPa and the free energy change was 2.43 kJ mol-1. The gate opening behaviour observed in this study shows ZIF-7 may have a potential selectivity for CH4 from N2 of more than 10 from an equimolar CH4 + N2 mixture. The equilibrium selectivity of ZIF-7 at 303 K and pressures close to 100 kPa are predicted to be 24 for CO2 from CH4 and 101 for CO2 from N2.

dc.languageEnglish
dc.publisherROYAL SOC CHEMISTRY
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DE140100569
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectTechnology
dc.subjectChemistry, Physical
dc.subjectEnergy & Fuels
dc.subjectMaterials Science, Multidisciplinary
dc.subjectChemistry
dc.subjectMaterials Science
dc.subjectMETAL-ORGANIC FRAMEWORK
dc.subjectCARBON-DIOXIDE ADSORPTION
dc.subjectSTRUCTURAL TRANSITIONS
dc.subjectSELECTIVE ADSORPTION
dc.subjectSEPARATION
dc.subjectMIXTURES
dc.subjectCAPTURE
dc.subjectGAS
dc.subjectTHERMODYNAMICS
dc.subjectMECHANISM
dc.titleGate opening effect of zeolitic imidazolate framework ZIF-7 for adsorption of CH4 and CO2 from N2
dc.typeJournal Article
dcterms.source.volume5
dcterms.source.number40
dcterms.source.startPage21389
dcterms.source.endPage21399
dcterms.source.issn2050-7488
dcterms.source.titleJournal of Materials Chemistry A
dc.date.updated2020-04-01T14:53:47Z
curtin.departmentWASM: Minerals, Energy and Chemical Engineering
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidArami-Niya, Arash [0000-0001-6450-0774]
dcterms.source.eissn2050-7496
curtin.contributor.scopusauthoridArami-Niya, Arash [36468096400]


Files in this item

Thumbnail
Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record