Microporous Molybdenum Silicate Xerogel Catalyst for Propylene Metathesis Prepared via Non-aqueous Sol-Gel
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Microporous Molybdenum Silicate Xerogel Catalyst for Propylene Metathesis Prepared via Non-aqueous Sol-Gel
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Microporous Molybdenum Silicate Xerogel Catalyst for Propylene Metathesis Prepared via Non-aqueous Sol-Gel
Popis výsledku anglicky
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.
Klasifikace
Druh
O - Ostatní výsledky
CEP obor
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OECD FORD obor
10402 - Inorganic and nuclear chemistry
Návaznosti výsledku
Projekt
<a href="/cs/project/LUAUS23085" target="_blank" >LUAUS23085: Syntéza nových vysoce aktivních metalosilikátových katalyzátorů pro metatezi olefinů</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů