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dc.contributor.authorLozinska, Magdalena
dc.contributor.authorMangano, Enzo
dc.contributor.authorGreenaway, Alexander
dc.contributor.authorFletcher, Robin
dc.contributor.authorThompson, Stephen
dc.contributor.authorMurray, Claire
dc.contributor.authorBrandani, Stefano
dc.contributor.authorWright, Paul Anthony
dc.date.accessioned2017-08-08T23:33:46Z
dc.date.available2017-08-08T23:33:46Z
dc.date.issued2016-09-08
dc.identifier.citationLozinska , M , Mangano , E , Greenaway , A , Fletcher , R , Thompson , S , Murray , C , Brandani , S & Wright , P A 2016 , ' Cation control of molecular sieving by flexible Li-containing zeolite Rho ' , Journal of Physical Chemistry C , vol. 120 , no. 35 , pp. 19652-19662 . https://doi.org/10.1021/acs.jpcc.6b04837en
dc.identifier.issn1932-7447
dc.identifier.otherPURE: 242396951
dc.identifier.otherPURE UUID: 23f92843-b58f-4cd0-a3c0-7ea23f8b78f8
dc.identifier.otherScopus: 84986230422
dc.identifier.otherWOS: 000383004700018
dc.identifier.otherORCID: /0000-0002-4243-9957/work/62668246
dc.identifier.urihttp://hdl.handle.net/10023/11410
dc.descriptionThe authors thank the EPSRC for funding (AMPGas EP/J02077X/1, A.G.G., S.B., P.A.W.; and a PhD+ scholarship for M.M.L.)en
dc.description.abstractThe adsorption of CO2 on zeolite Li-Rho (unit cell composition Li9.8Al9.8Si38.2O96) has been investigated by the measurement of adsorption isotherms (273–300 K), breakthrough curves with a CO2/CH4/He mixture (308 K), and in situ synchrotron X-ray powder diffraction in CO2 (298 K). The Rho framework distorts when in the Li-form to give a shape selective adsorbent for CO2 over CH4, although breakthrough curves reveal diffusional limitations. In situ synchrotron powder XRD follows the expansion of the Li-Rho unit cell upon adsorption, which remains single phase to a CO2 pressure of ca. 0.6 bar. Partial cation exchange of Li-Rho by Na+ or Cs+ gives two series of M,Li-Rho zeolites (M = Na, Cs). Where the occupancy of window sites (8R, D8R) between lta cages is less than 50%, hysteresis is not observed in CO2 isotherms at 298 K. For Cs1.8Li8-Rho, which has a larger unit cell and a wider window than zeolite Li-Rho due to the presence of large Cs+ cations in double 8-ring sites, breakthrough curves indicate faster CO2 diffusion without significant loss of selectivity. We propose this control of adsorption kinetics of the flexible zeolite Rho via modification of cation content as a mechanism for cation controlled molecular sieving.
dc.format.extent11
dc.language.isoeng
dc.relation.ispartofJournal of Physical Chemistry Cen
dc.rightsCopyright © 2016 American Chemical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1021/acs.jpcc.6b04837en
dc.rightsCopyright © 2016 American Chemical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1021/acs.jpcc.6b04837en
dc.subjectQD Chemistryen
dc.subjectDASen
dc.subject.lccQDen
dc.titleCation control of molecular sieving by flexible Li-containing zeolite Rhoen
dc.typeJournal articleen
dc.description.versionPostprinten
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.identifier.doihttps://doi.org/10.1021/acs.jpcc.6b04837
dc.description.statusPeer revieweden
dc.date.embargoedUntil2017-08-08


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