Microporous Molybdenum Silicate Xerogel Catalyst for Propylene Metathesis Prepared via Non-aqueous Sol-Gel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F23%3A63574738" target="_blank" >RIV/70883521:28610/23:63574738 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Microporous Molybdenum Silicate Xerogel Catalyst for Propylene Metathesis Prepared via Non-aqueous Sol-Gel
Original language description
New microporous molybdenum silicate xerogels were prepared via a novel approach combining microwave-assisted heating and non-hydrolytic sol-gel condensation. Within MW-assisted heating, a hybrid molybdenum-based precursor solution is formed. Further, this molybdenum precursor-containing solution is mixed with the Bis{triethoxysilylpropyl)amine solution in N,N' -dimethylformamide. After the evaporation of the DMF solvent, the orange-brown transparent brittle glassy gel was separated. A microporous xerogel was obtained after calcination at 500 °C in the atmosphere of air. The molybdenum content in this Mo-Si02 catalyst was ca. 3.1 wt.%. The truly microporous character was observed and the surface area reached 512 m2 g-1. The homogeneous dispersion of predominantly isolated molybden um di-oxo species was demonstrated by Raman spectroscopy, ToF-SIMS, DRUV-Vis, and STEM-EDS. The catalytic activity of the prepared catalyst in propene metathesis achieved the steady-state rate of 1.53·10-5 mol g-1 s-1. Compared to the conventional Mo03/Si02 catalyst prepared via incipient wet impregnation technique, the microporous Mo-Si02 xerogel exhibited over an order of magnitude higher steady-state propylene metathesis rates at 200 °C.
Czech name
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Czech description
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Project
<a href="/en/project/LUAUS23085" target="_blank" >LUAUS23085: Synthesis of new highly active metallosilicate catalysts for olefin metathesis</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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