Show simple item record

dc.contributor.authorValecillos, José
dc.contributor.authorHita, Idoia
dc.contributor.authorSastre, Enrique
dc.contributor.authorAguayo, Andrés T.
dc.contributor.authorCastaño, Pedro
dc.date.accessioned2021-04-26T11:40:12Z
dc.date.available2021-04-26T11:40:12Z
dc.date.issued2021-05-18
dc.date.submitted2021-01-25
dc.identifier.citationValecillos, J., Hita, I., Sastre, E., Aguayo, A. T., & Castaño, P. (2021). Implications of co-feeding water on the growth mechanisms of retained species on a SAPO-18 catalyst during the methanol-to-olefins reaction. ChemCatChem. doi:10.1002/cctc.202100124
dc.identifier.issn1867-3880
dc.identifier.issn1867-3899
dc.identifier.doi10.1002/cctc.202100124
dc.identifier.urihttp://hdl.handle.net/10754/668968
dc.description.abstractThe dynamics of retained and deactivating species in a SAPO-18 catalyst during the methanol-to-olefins reaction have been followed using a combination of ex-situ and in-situ techniques; performed in differential and integral reactors. The retained species have been analyzed using extraction, in-situ FTIR and in-situ UV-vis spectroscopies combined with online product analysis (gas chromatography and mass spectrometry). In particular, here we provide the detailed composition of the retained species given by the high-resolution mass spectrometry (LDI FT-ICR MS). We observe a decrease of both formation and degradation rates of retained species by water, whereas the extent of these decreases is the same across the entire spectrum of retained molecules. This result is profound because it indicates that added water unselectively quenches the formation of active and deactivating species. At the same time, the catalyst can have an extended lifetime by adding water and we proved that this is due to the expulsion of species (particularly olefins) out of the SAPO-18 framework, and subsequent growth of heavy polycyclic aromatic structures that imply less deactivation. These conclusions can be extrapolated to other MTO catalysts with relatively similar pore topology such as SAPO-34 or SSZ-13 structures.
dc.description.sponsorshipThis work was possible thanks to the financial support of the Ministry of Economy, Industry and Competitiveness of the Spanish Government (Project CTQ2016-79646-P, co-founded with ERDF funds), the Basque Government (Project IT748-13, IT912-16) and the King Abdullah University of Science and Technology (KAUST). J.V. is thankful for his fellowship granted by the Ministry of Economy, Industry and Competitiveness of the Spanish Government (BES-2014-069980). The authors are thankful for technical and human support provided by IZO-SGI SGIker of UPV/EHU and European funding (ERDF and ESF).
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/10.1002/cctc.202100124
dc.rightsArchived with thanks to ChemCatChem
dc.titleImplications of co-feeding water on the growth mechanisms of retained species on a SAPO-18 catalyst during the methanol-to-olefins reaction
dc.typeArticle
dc.contributor.departmentKing Abdullah University of Science and Technology KAUST Catalysis Center King Abdullah University of Science and TechnologyArabia Saudí 23955-6900 Thuwal SAUDI ARABIA
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalChemCatChem
dc.rights.embargodate2022-04-19
dc.eprint.versionPost-print
dc.contributor.institutionUniversity of the Basque Country Chemical Engineering P.O. Box 644 48080 Bilbao SPAIN
dc.contributor.institutionCSIC: Consejo Superior de Investigaciones Cientificas Instituto de Catálisis y Petroleoquímica C/Marie Curie, 2 28049 Madrid SPAIN
dc.contributor.institutionUniversity of the Basque Country: Universidad del Pais Vasco Department of Chemical Engineering P.O. Box 644 48080 Bilbao SPAIN
kaust.personHita, Idoia
kaust.personCastano, Pedro
dc.date.accepted2021-04-16
refterms.dateFOA2021-04-26T11:40:44Z
dc.date.published-online2021-05-18
dc.date.published-print2021-07-07


Files in this item

Thumbnail
Name:
Implications_cctc.202100124.pdf
Size:
1.447Mb
Format:
PDF
Description:
Accepted manuscript

This item appears in the following Collection(s)

Show simple item record