Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Olefin Epoxidation over Metal-Organic Frameworks Modified with Transition Metals
Abstract Mixed aluminum-containing metal-organic frameworks (MOF) modified with Fe, V, and Ti are synthesized in two steps. At the first step, the amorphous precursors of metal-organic frameworks containing various amounts of transition metals are obtained by the electrochemical method. At the second step, the precursors are crystallized under solvothermal conditions. Study of the effect of synthesis conditions shows that Fe-containing metal-organic frameworks crystallize in the presence of dimethylformamide; V- and Ti-containing counterparts crystallize in the presence of water. The time and temperature of crystallization are varied in the range from 150 to 200°С and 24 to 72 h depending on the concentration of the transition metals. The resulting samples are investigated by low-temperature nitrogen adsorption, scanning electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, and thermogravimetric and differential thermal analysis (TGA-DTA). Research into the influence of catalyst composition on its activity in 1-octene epoxidation by tert-butyl hydroperoxide suggests that that the titanium-containing samples are catalytically inactive, while the vanadium-containing samples are more active than the iron-containing ones. Testing of the vanadium-containing samples in propylene epoxidation demonstrates that their activity is comparable with the activity of a commercial titanium silicate catalyst.
Olefin Epoxidation over Metal-Organic Frameworks Modified with Transition Metals
Abstract Mixed aluminum-containing metal-organic frameworks (MOF) modified with Fe, V, and Ti are synthesized in two steps. At the first step, the amorphous precursors of metal-organic frameworks containing various amounts of transition metals are obtained by the electrochemical method. At the second step, the precursors are crystallized under solvothermal conditions. Study of the effect of synthesis conditions shows that Fe-containing metal-organic frameworks crystallize in the presence of dimethylformamide; V- and Ti-containing counterparts crystallize in the presence of water. The time and temperature of crystallization are varied in the range from 150 to 200°С and 24 to 72 h depending on the concentration of the transition metals. The resulting samples are investigated by low-temperature nitrogen adsorption, scanning electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, and thermogravimetric and differential thermal analysis (TGA-DTA). Research into the influence of catalyst composition on its activity in 1-octene epoxidation by tert-butyl hydroperoxide suggests that that the titanium-containing samples are catalytically inactive, while the vanadium-containing samples are more active than the iron-containing ones. Testing of the vanadium-containing samples in propylene epoxidation demonstrates that their activity is comparable with the activity of a commercial titanium silicate catalyst.
Olefin Epoxidation over Metal-Organic Frameworks Modified with Transition Metals
Kravchenko, D. E. (Autor:in) / Tyablikov, I. A. (Autor:in) / Kots, P. A. (Autor:in) / Kolozhvari, B. A. (Autor:in) / Fedosov, D. A. (Autor:in) / Ivanova, I. I. (Autor:in)
Petroleum Chemistry ; 58 ; 1255-1262
01.12.2018
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Cyclohexene Epoxidation Catalysts Based on Porous Aromatic Frameworks
| Springer Verlag | 2020
| Wiley | 2020
Performance of peroxyheteropoly anions in phase-transfer catalysis of olefin epoxidation reactions
| Springer Verlag | 2006
Metal Organic Frameworks: Patterning Techniques for Metal Organic Frameworks (Adv. Mater. 24/2012)
| British Library Online Contents | 2012
Liquid phase adsorption of selected chloroaromatic compounds over metal organic frameworks
| British Library Online Contents | 2013