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dc.contributor.authorVeselý, Ondřej
dc.contributor.authorPang, Hao
dc.contributor.authorVornholt, Simon M.
dc.contributor.authorMazur, Michal
dc.contributor.authorYu, Jihong
dc.contributor.authorOpanasenko, Maksym
dc.contributor.authorEliášová, Pavla
dc.date.accessioned2019-06-14T23:40:38Z
dc.date.available2019-06-14T23:40:38Z
dc.date.issued2019-03-01
dc.identifier.citationVeselý , O , Pang , H , Vornholt , S M , Mazur , M , Yu , J , Opanasenko , M & Eliášová , P 2019 , ' Hierarchical MTW zeolites in tetrahydropyranylation of alcohols : comparison of bottom-up and top-down methods ' , Catalysis Today , vol. 324 , pp. 123-134 . https://doi.org/10.1016/j.cattod.2018.06.010en
dc.identifier.issn0920-5861
dc.identifier.otherPURE: 253391176
dc.identifier.otherPURE UUID: 64bc4580-00a5-4ecf-8fa3-f7693b0cc488
dc.identifier.otherRIS: urn:0D6887884EC5E4827FFFF5A6EAD5A264
dc.identifier.otherScopus: 85048576411
dc.identifier.otherWOS: 000456316500016
dc.identifier.urihttp://hdl.handle.net/10023/17901
dc.descriptionAuthors thank the Czech Science Foundation for financial support (17-06524Y). H.P. and J.Y. thank to the 111 project of the Ministry of Education of China (B17020). M.M. and S.M.V. acknowledge the support of EPSRC grant EP/K025112/1 and Capital for Great Technologies Grant EP/L017008/1.en
dc.description.abstractDespite a widespread application of zeolites in catalysis, these microporous materials still suffer from a low accessibility of active sites located deep in crystals due to limited size of channels (< 1 nm). Here, we prepared a series of micro-mesoporous zeolites with MTW topology and similar Si/Al molar ratio (50). Two topical approaches were applied here: i. bottom-up synthesis with a surfactant-SDA leading to so-called nanosponge material; ii. top-down desilication of bulk crystals by NaOH solution in the presence of tetraalkylammonium cations (TAA+). Prepared materials were characterized by powder X-ray diffraction, sorption of nitrogen, adsorption of pyridine and di-tert-butyl-pyridine followed by FTIR, solid state 27Al NMR, ICP-OES, SEM, TEM, and STEM-EDS. It was found that the desilication of MTW in the presence of TAA+ proceeds in different pathway compared to well-studied MFI. This variance was attributed to the different dimensionality of their channel systems (1D vs. 3D). Materials were tested in tetrahydropyranylation of alcohols differing in a chain length and degree of branching. The nanosponge MTW shows generally very good performance. Nevertheless, in cases of the branched alcohols MTW materials desilicated in the presence of TAA+ exhibited comparable or even higher activity than nanosponge based on TOF values. Therefore, desilicated MTW presents cheaper and equally or more effective catalyst compared to nanosponge material with the same topology.
dc.language.isoeng
dc.relation.ispartofCatalysis Todayen
dc.rights© 2018 Elsevier B.V. This work has been 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://doi.org/10.1016/j.cattod.2018.06.010en
dc.subjectZeoliteen
dc.subjectMTWen
dc.subjectHierarchical porosityen
dc.subjectTetrahydropyranylation of alcoholsen
dc.subjectNanospongeen
dc.subjectDesilicationen
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subject.lccQDen
dc.titleHierarchical MTW zeolites in tetrahydropyranylation of alcohols : comparison of bottom-up and top-down methodsen
dc.typeJournal articleen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.identifier.doihttps://doi.org/10.1016/j.cattod.2018.06.010
dc.description.statusPeer revieweden
dc.date.embargoedUntil2019-06-15


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