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Electrospun Catalytic Support Prepared by Electrospinning Technique
Soukup, Karel ; Topka, Pavel ; Petráš, D. ; Klusoň, Petr ; Šolcová, Olga
Our work has been focused on preparation of an electrospun catalytic support based on poly(2,6-dimethyl-1,4-phenylene oxide). A set of nanofibrous catalysts were prepared by the wet impregnation technique with the solution of platinum(II) acetylacetonate and subsequent activated by calcination in air.
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Plný tet: SKMBT_C22012102414070 - Download fulltextPDF
BIORAF – Biorefinery Research Centre of Competence
Topka, Pavel ; Hajšlová, J. ; Demnerová, K. ; Cepák, Vladislav ; Vosátka, Miroslav ; Jiřičný, Vladimír ; Jandejsek, Z. ; Kopenec, J. ; Šmejkal, M. ; Kaštánek, P. ; Šolcová, Olga
The project, which started in 2012, creates an interdisciplinary center with high innovation potential for sustainable utilization of renewable sources, and will bring the Czech Republic to the leading position in next-generation biorefinery within next eight years. The project links the private sector with experts from different fields of science (e.g., biosciences, phycology, analytical chemistry, enzymology, microbiology, chemical and biochemical engineering, material engineering, etc.).
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Plný tet: SKMBT_C22012102413542 - Download fulltextPDF
Transport and Catalytic Properties of Polymeric Nanofibrous Layers Prepared by Electrospinning
Soukup, Karel ; Topka, Pavel ; Petráš, D. ; Šolcová, Olga
This work has been focused on the electrospinning generation of nanofibrous membranes from polystyrene, polyurethane and polyphenylene oxide (poly(2,6-dimethyl-1,4-phenyleneoxide) – PPO), on their texture and transport properties determination and catalytic activity of the platinum catalyst supported on PPO membrane.
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Colloidal Silica as an Efficient Binder for the Preparation of Al-SBA-15 Pellets
Topka, Pavel ; Karban, Jindřich ; Soukup, Karel ; Jirátová, Květa ; Šolcová, Olga
The objective of this contribution was to examine the possibility of using colloidal silica as a binder for the preparation of extrudates or pellets from mesoporous molecular sieves. Al- SBA-15 pellets with different content of colloidal silica were prepared and their textural properties and mechanical stability were investigated. The catalytic activity of the pellets in Friedel-Crafts alkylation of toluene with benzyl alcohol was directly compared to that of binder-free pellets and powder catalyst.
Hodnocení texturních, mechanických a katalytických vlastností pelet Al-SBA-15 s nízkým obsahem křemičitanového pojiva
Topka, Pavel ; Karban, Jindřich ; Soukup, Karel ; Šolcová, Olga
This contribution deals with evaluation on textural, mechanical, and catalytic properties of Al-SBA-15 pellets with low content of silica binder.
Samonosné pelety z (Al)-SBA-15
Topka, Pavel ; Zub, Yu.L. ; Šolcová, Olga
Self-supporting pellets were successfully formed from SBA-15 and Al-SBA-15 powder without the addition of binder or plasticizer. Prepared self-supporting pellets maintained the porous structure of original powder. In comparison with parent sample, a decrease of mesopore surface area and mesopore volume up to 40 % was noticed in the case of pellets formed with the highest 17.7 MPa pressure. The Al-SBA-15 pellets prepared using 4.7 MPa forming pressure were enough mechanically stable to retain the structural integrity during batch alkylation of toluene with benzyl alcohol at 110 °C. The conversion reached with Al-SBA-15 pellets after 60 min of the reaction was about five times lower than that accomplished with powder Al-SBA-15.
Oxid molybdenový nanesený na mesoporézní silice – nový vysoce aktivní katalyzátor pro metathese olefinů
Topka, Pavel ; Balcar, Hynek
New types of heterogeneous catalysts for alkene metathesis based on molybdenum oxide supported on mesoporous molecular sieves MCM-41, MCM-48 and SBA-15 showed considerably higher activity compared with MoO3 supported on conventional silica. In metathesis of 1-octene, the highest activity exhibited MoO3/MCM-41 with 6 wt. % of Mo (75 % conversion after 6 h at 40 oC with selectivity to 7-tetradecene 85 %). The turn-over frequency of the catalysts loaded with 8 wt. % of Mo decreased in the order MCM-41 > MCM-48 > SBA-15, while the selectivity slightly increased in the same order (from 62 to 95 %). Using Raman spectroscopy, the differences in the catalytic activity were elucidated as a result of different dispersion of the active phase over the supports.
Samonosné pelety z molekulového síta (Al-)SBA-15
Topka, Pavel ; Klusoň, Petr ; Šolcová, Olga
This contribution describes self-supporting pellets from (Al-)SBA-15 molecular sieve.

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