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Experimental energetics of large and extra-large pore zeolites: Pure silica beta polymorph C (BEC) and Ge-containing ITQ-33

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Experimental energetics of large and extra-large pore zeolites: Pure silica beta polymorph C (BEC) and Ge-containing ITQ-33

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dc.contributor.author Wu, L. es_ES
dc.contributor.author Hughes, J. es_ES
dc.contributor.author Moliner Marin, Manuel es_ES
dc.contributor.author Navrotsky, A. es_ES
dc.contributor.author Corma Canós, Avelino es_ES
dc.date.accessioned 2017-09-29T12:36:13Z
dc.date.available 2017-09-29T12:36:13Z
dc.date.issued 2014-03-15
dc.identifier.issn 1387-1811
dc.identifier.uri http://hdl.handle.net/10251/88298
dc.description.abstract [EN] The enthalpies of formation of the large pore pure silica beta polymorph C (BEC) and the extra-large pore germanosilicate ITQ-33 zeolite are investigated by high temperature oxide melt solution calorimetry. The enthalpies of formation from quartz for two BECs synthesized with different organic structure directing agents, SDA1 and SDA9 differ by 4 kJ/mol. The two SDAs produce phases with different properties as well as different energetics for the same framework and composition, due to the different amount of structural defects, while the more defective BEC is energetically less stable by 4 kJ/mol. The enthalpy of formation of defect-free pure silica BEC agrees with the predicted value proposed several years ago. Moreover, the enthalpy of formation of ITQ-33 (Ge/(Ge + Si) = 0.3) supports the energetic trends seen previously, namely that the enthalpy of formation becomes more endothermic as the content of double four rings (D4R) increases. The previous trend of energetics of porous materials versus molar volume is supported by the present data, with a diminishing destabilization for very open structures. es_ES
dc.description.sponsorship This calorimetric work at UC Davis was supported by the U.S. Department of Energy, Grant DE-FG02-05ER15667.
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation DOE/DE-FG02-05ER15667 es_ES
dc.relation.ispartof Microporous and Mesoporous Materials es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Calorimetry es_ES
dc.subject Large pore zeolites es_ES
dc.subject BEC es_ES
dc.subject Ge-zeolites es_ES
dc.subject ITQ-33 es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.title Experimental energetics of large and extra-large pore zeolites: Pure silica beta polymorph C (BEC) and Ge-containing ITQ-33 es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.micromeso.2013.12.013
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Wu, L.; Hughes, J.; Moliner Marin, M.; Navrotsky, A.; Corma Canós, A. (2014). Experimental energetics of large and extra-large pore zeolites: Pure silica beta polymorph C (BEC) and Ge-containing ITQ-33. Microporous and Mesoporous Materials. 187:77-81. doi:10.1016/j.micromeso.2013.12.013 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1016/j.micromeso.2013.12.013 es_ES
dc.description.upvformatpinicio 77 es_ES
dc.description.upvformatpfin 81 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 187 es_ES
dc.relation.senia 279928 es_ES
dc.identifier.eissn 1873-3093
dc.contributor.funder U.S. Department of Energy


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