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Is 1-hexene epoxidation in TS-1 diffusion limited in different solvents?

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F06%3A00076162" target="_blank" >RIV/61388955:_____/06:00076162 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Is 1-hexene epoxidation in TS-1 diffusion limited in different solvents?

  • Original language description

    PFG NMR diffusion measurements were carried out to determine the effect of solvent on intracrystalline reactant diffusivities and on 1-hexene epoxidation rates in TS-1 catalyst. Using n-hexane in silicalite as a mimic for the TS-1 system, the self-diffusivity of n-hexane in silicalite was found to be 24% higher in methanol solvent than in acetonitrile solvent and 45% higher than in acetone solvent. The presence of trace Al did not affect n-hexane diffusivity. Based on analysis of the Weisz modulus for aslab morphology, the 1-hexene epoxidation reaction in TS-1 was found to be diffusion limited only if the crystal size is at least 38 .mu.m in the methanol system.

  • Czech name

    Je epoxidace 1-hexenu v TS-1 difúzi limitována různými rozpouštědly?

  • Czech description

    Byla prováděna difuzní měření pomocí PFG NMR techniky s cílem určit vliv rozpouštědla na intrakrystalické difusivity reaktantu a na rychlosti epoxidace 1-hexenu. Použití n-hexanu v silikalitu, který napodobuje TS-1 systém, bylo zjištěno, že je samodifusivita n-hexanu v silikalitu o 24% vyšší v metanolu než v acetonitrilu a o 45% vyšší než v acetonu. Přítomnost stop Al neovlivnila difusivitu n-hexanu. Pomocí analýzy Weiszova modulu pro destičkovou morfologii krystalu bylo zjištěno, že epoxidační reakce 1-hexenu v TS-1 je limitována difuzí pro reakci provedenou v metanolu pouze je-li velikost krystalu minimálně 38 .mu.m.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CF - Physical chemistry and theoretical chemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2006

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Catalysis Commununication

  • ISSN

    1566-7367

  • e-ISSN

  • Volume of the periodical

    7

  • Issue of the periodical within the volume

    12

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    5

  • Pages from-to

    936-940

  • UT code for WoS article

  • EID of the result in the Scopus database