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Cation Gating and Relocation during the Highly Selective Trapdoor Adsorption of CO2 on Univalent Cation Forms of Zeolite Rho

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Cation Gating and Relocation during the Highly Selective Trapdoor Adsorption of CO2 on Univalent Cation Forms of Zeolite Rho

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dc.contributor.author Lozinska, Magdalena M. es_ES
dc.contributor.author Mowat, John P. S. es_ES
dc.contributor.author Wright, Paul A. es_ES
dc.contributor.author Thompson, Stephen P. es_ES
dc.contributor.author Jorda Moret, Jose Luis es_ES
dc.contributor.author Palomino Roca, Miguel es_ES
dc.contributor.author Valencia Valencia, Susana es_ES
dc.contributor.author Rey Garcia, Fernando es_ES
dc.date.accessioned 2016-07-04T12:05:25Z
dc.date.issued 2014-03-25
dc.identifier.issn 0897-4756
dc.identifier.uri http://hdl.handle.net/10251/67036
dc.description.abstract Adsorption of CO2 and CH4 has been measured on the Na-, K-, and Cs-forms of zeolite Rho (0 9 bar; 283 333 K). Although CH4 is excluded, CO2 is readily taken up, although the uptake at low pressures decreases strongly, in the order Na+ > K+ > Cs+. Structural studies by powder X-ray diffraction (PXRD) suggest that cations in intercage window sites block CH4 adsorption; however, in the presence of CO2, the cations can move enough to permit adsorption (several angstroms). Determination of time-averaged cation positions during CO2 adsorption at 298 K by Rietveld refinement against PXRD data shows that (i) in Na-Rho, there is a small relaxation of Na+ cations within single eight-ring (S8R) sites, (ii) in Cs-Rho, D8R cations move to S8R sites (remaining within windows) and two phases of Cs-Rho (I4̅3m, Im3̅m) are present over a wide pressure range, and (iii) in K-Rho, there is relocation of some K+ cations from window sites to cage sites and two phases coexist, each with I4̅3m symmetry, over the pressure range of 0 1 bar. The final cation distributions at high PCO2 are similar for Na-, K-, and Cs-Rho, and adsorption in each case is only possible by trapdoor -type cation gating. Complementary studies on K-chabazite (Si/Al = 3) also show changes in time-averaged cation location during CO2 adsorption. es_ES
dc.description.sponsorship The authors thank the EPSRC for financial support to M.M.L and PAW. (No. EP/G062129/1, Innovative Gas Separations for Carbon Capture and postgraduate awards for J.P.S.M. and M.M.L.), and F.R., S.V., M.P., and J.L.J. thank the Spanish Government (Nos. MAT2012-38567-C02-01 and CTQ2010-17988/PPQ Consolider Ingenio No. 2010-Multicat CSD-2009-00050 and Severo Ochoa No. SEV-2012-0267). We thank Professor Chiu C. Tang and Claire Murray for assistance at the I-II Beam line at the Diamond Light Source (DLS) and DLS for beamtime (Award No. EE9027). en_EN
dc.language Inglés es_ES
dc.publisher American Chemical Society es_ES
dc.relation EPSRC EP/G062129/1 es_ES
dc.relation info:eu-repo/grantAgreement/MINECO//MAT2012-38567-C02-01/ES/MATERIALES ZEOLITICOS COMO ESTRUCTURAS ANFITRIONAS DE NANOPARTICULAS. SINTESIS Y APLICACIONES NANOTECNOLOGICAS, CATALITICAS Y MEDIOAMBIENTALES/ es_ES
dc.relation info:eu-repo/grantAgreement/MICINN//CTQ2010-17988/ES/CATALIZADORES AVANZADOS PARA LA CONVERSION DE GAS DE SINTESIS EN COMBUSTIBLES/ es_ES
dc.relation Spanish Government 2010-Multicat CSD-2009-00050 es_ES
dc.relation Spanish Government SEV-2012-0267 es_ES
dc.relation DLS EE9027 es_ES
dc.relation.ispartof Chemistry of Materials es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Zeolite es_ES
dc.subject Adsorption es_ES
dc.subject CO2 es_ES
dc.subject Methane es_ES
dc.subject Rho es_ES
dc.subject Trapdoor es_ES
dc.title Cation Gating and Relocation during the Highly Selective Trapdoor Adsorption of CO2 on Univalent Cation Forms of Zeolite Rho es_ES
dc.type Artículo es_ES
dc.embargo.lift 10000-01-01
dc.embargo.terms forever es_ES
dc.identifier.doi 10.1021/cm404028f
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.description.bibliographicCitation Lozinska, MM.; Mowat, JPS.; Wright, PA.; Thompson, SP.; Jorda Moret, JL.; Palomino Roca, M.; Valencia Valencia, S.... (2014). Cation Gating and Relocation during the Highly Selective Trapdoor Adsorption of CO2 on Univalent Cation Forms of Zeolite Rho. Chemistry of Materials. 26(6):2052-2061. https://doi.org/10.1021/cm404028f es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1021/cm404028f es_ES
dc.description.upvformatpinicio 2052 es_ES
dc.description.upvformatpfin 2061 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 26 es_ES
dc.description.issue 6 es_ES
dc.relation.senia 261344 es_ES
dc.contributor.funder Ministerio de Ciencia e Innovación es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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