Publicação
Thermal and hydrothermal stability of silicoaluminophosphate SAPO-40
| dc.contributor.author | Lourenço, J. P. | |
| dc.contributor.author | Ribeiro, M. F. | |
| dc.contributor.author | Ribeiro, F. R. | |
| dc.contributor.author | Rocha, J. | |
| dc.contributor.author | Gabelica, Z. | |
| dc.contributor.author | Derouane, E. G. | |
| dc.date.accessioned | 2012-06-15T14:11:13Z | |
| dc.date.available | 2012-06-15T14:11:13Z | |
| dc.date.issued | 1995 | |
| dc.date.updated | 2012-06-15T10:37:37Z | |
| dc.description.abstract | Thermal and hydrothermal stability of SAPO-40 were studied by X-ray powder diffraction (XRD) and magic-angle spinning nuclear magnetic resonance (MAS-NMR). For the X-ray study, the hydrothermal treatments were carried out, in situ, in a high-temperature chamber. The SAPO-40 structure shows a remarkable stability to high temperatures under both dry and humid air. At high temperatures a reorganisation of silicon occurs, but the long-range order is only lost above ca. 1000°C. Changes in the XRD pattern induced by water at room temperature are completely reversible upon re-heating at 200°C, as well as the changes in the coordination and local environments of aluminium and phosphorus observed by NMR. For silicon however, some changes, that are observed upon hydration, remain after dehydration. | por |
| dc.identifier.citation | Lourenço, J. P.; Ribeiro, M. F.; Ribeiro, F. R.; Rocha, J.; Gabelica, Z.; Derouane, E. Thermal and hydrothermal stability of silicoaluminophosphate SAPO-40. Microporous Materials, 4, 445-453, 1995. | por |
| dc.identifier.other | AUT: JLO01215; | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/1250 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.subject | X-ray diffraction | por |
| dc.subject | Thermal treatment | por |
| dc.subject | SAPO-40 | por |
| dc.subject | NMR | por |
| dc.title | Thermal and hydrothermal stability of silicoaluminophosphate SAPO-40 | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 453 | por |
| oaire.citation.issue | 4 | por |
| oaire.citation.startPage | 445 | por |
| oaire.citation.title | Microporous Materials | por |
| person.familyName | Lourenço | |
| person.givenName | João P. | |
| person.identifier | 634248 | |
| person.identifier.ciencia-id | F81F-A1F0-2A7C | |
| person.identifier.orcid | 0000-0002-0501-6672 | |
| person.identifier.rid | A-7758-2008 | |
| person.identifier.scopus-author-id | 57195730600 | |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | f66ab886-d989-4c1d-9550-527507723c26 | |
| relation.isAuthorOfPublication.latestForDiscovery | f66ab886-d989-4c1d-9550-527507723c26 |