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Národní úložiště šedé literatury Nalezeno 54 záznamů.  1 - 10dalšíkonec  přejít na záznam: Hledání trvalo 0.00 vteřin. 
Příprava monovrstevných a vícevrstevných katalyzátorů MoS2 pro rozklad H2S
 Kaluža, Luděk ; Zdražil, Miroslav ; Gulková, Daniela ; Soukup, Karel
Byl připraven monovrstevný katalyzátor MoS2/Al2O3 a vícevrstevné (krystalické) katalyzátory MoS2/Al2O3 a MoS2/TiO2. Byly stanoveny základní strukturně-texturní parametry katalyzátorů fyzisorpcí N2 a roentgenovou difrakční analýzou.
Úplný záznam
Preparation and Relative Activity of Nobia-Supported CoMo Hydrodesulfurization Catalysts.
 Kaluža, Luděk ; Zdražil, Miroslav
Evaluation of new supports alternative to alumina, for instance: ZrO2, TiO2, active carbon or zeolites, is an important topic of recent research on hydrodesulfurization catalysts. Nb2O5 was also considered as the support of Mo and Co(Ni)Mo sulfides and as a precursor of the active phase, niobium sulfide.
Plný tet: SKMBT_C22018110914040 - Stáhnout plný textPDF
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Úplný záznam
Nitrilotriacetic Acid Assisted Deposition of Cobalt Carbonate for the Preparation of Niobia Supported CoMo Hydrodesulfurization Catalysts.
 Kaluža, Luděk ; Zdražil, Miroslav
In the present work, we have prepared the impregnation solution by the new method not using volatile and corrosive NH4OH. Briefly, NTA is practically insoluble in water (0.13 g/100 ml) and pH of its water suspension is about 2.1. Newly, we applied cobalt carbonate, which is also almost insoluble in water (0.3 g/100 ml) and pH of its water suspension is about 8.3. However, we have found that very low solubilities of NTA and cobalt carbonate were sufficient for their mutual reaction in suspension.
Plný tet: SKMBT_C22018100509420 - Stáhnout plný textPDF
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Niobia Supported Molybdenum Sulfide Hydrodesulfurization Catalysts Prepared using Nitrilotriacetic Acid.
 Kaluža, Luděk ; Zdražil, Miroslav
Plný tet: SKMBT_C22016112410230 - Stáhnout plný textPDF
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12M-IMMEDIATE Research Report: Preparation of Pt on Carbon Black Supported Catalysts
 Kaluža, Luděk ; Zdražil, Miroslav ; Gulková, Daniela ; Vít, Zdeněk ; Šolcová, Olga ; Soukup, Karel ; Maixnerová, Lucie
The aim of this work was to elucidate on advanced preparation of Pt/C catalysts from TimCal carbon black and H2PtCl6. The attention was directed to residual content of chloride in the prepared catalysts and scale-up to the amount about 1 gram of final product. The textrual properties of the supports and selected catalyst were studied by nitrogen physisorption. The analytical methods such as instrumental neutron activation analysis (INAA), liquid ion chromatography (LC), and titration with silver nitrates were applied for Cl analysis. Electron probe micro analysis (SEM-EDX), hydrogen chemisorption, temperature programed desorption of hydrogen (TPD) and a simplified determination of ignition temperature in air flow were used for Pt/C catalysts characterization.
Úplný záznam
18M-IMMEDIATE Research Report: Prototype of Catalyst Powder Sufficient for Testing in MEAs Fabricated
 Kaluža, Luděk ; Zdražil, Miroslav ; Gulková, Daniela ; Koštejn, Martin ; Vít, Zdeněk
High loadings of platinum (60 wt%) were precipitated (ICPF) or depo-sited (CNRS) onto research grade carbon black supports provided by TC. The supports and the resulting electrocatalysts were thoroughly characterised in order to select the best ones for optimisation and up-scaled manufacturing. For the preparation and characterisation vari-ous methodologies have been developed. Batches of the gram size were prepared of a handful of the most promising catalysts. This is sufficient for the preparation of test MEAs.
Úplný záznam
Preparation of Hydrodesulfurization Magnesia Supported Cobalt-Molybdenum Catalysts
 Kaluža, Luděk ; Gulková, Daniela ; Vít, Zdeněk ; Zdražil, Miroslav
The aim of the present work was to elucidate the possibility of deposition of molybdenyl- and cobalt- acetylacetonates on the high surface area MgO by impregnation from solutions of these compounds in methanol. The prepared CoMo/MgO catalysts exhibited at least 3.3 fold activities in benzothiophene HDS as the reference industrial CoMo/Al2O3 catalyst.
Plný tet: SKMBT_C22014110714021 - Stáhnout plný textPDF
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Highly Loaded Carbon Black Supported Platinum Catalysts for Fuel Batteries
 Kaluža, Luděk ; Zdražil, Miroslav ; Gulková, Daniela
Carbon supported Pt represents conventional catalyst in polymer electrolyte membrane fuel battery (PEM fuel cell). The aim of this work was to elucidate on the methods of Pt deposition on carbon black to achieve high loadings of Pt of about 60 wt.% in highly dispersed form.
Plný tet: SKMBT_C22014110714020 - Stáhnout plný textPDF
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Úplný záznam
Preparation of CoMo/MgO Catalysts for Hydrodesulfurization
 Gulková, Daniela ; Kaluža, Luděk ; Zdražil, Miroslav ; Vít, Zdeněk
The aim of the present work was to elucidate the possibility of deposition of molybdenyland cobalt- acetylacetonates on the high surface area MgO by impregnation from solutions of these compounds in methanol. Furthermore, non-aqueous solutions of MoO3 and CoCO3, (NH4)6Mo7O24 and Co(NO3)2, MoO2(C5H7O2)2 and Co(C5H7O2)2 with chelating agent nitrilotriacetic acid (NTA) were studied for CoMo deposition in one impregnation step.
Plný tet: SKMBT_C22014082908311 - Stáhnout plný textPDF
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Highly Loaded Carbon Black Supported Pt Catalysts for Fuel Cells
 Kaluža, Luděk ; Zdražil, Miroslav ; Gulková, Daniela ; Vít, Zdeněk ; Šolcová, Olga ; Soukup, Karel ; Maixnerová, Lucie
The aim of this work was to elucidate on the methods of Pt deposition on carbon black to achieve high loadings of Pt of about 60 wt.% in highly dispersed form. The carbon black supports were characterized by nitrogen physisorption. Platinum was deposited on the supports: from true solutions of H2PtCl6, Pt(C5H7O2)2, Pt(NH3)4(NO3)2, or Pt(NH3)2(NO2)2, and from fine dispersions of Pt(C5H7O2)2, PtO2, Pt(NH3)4(OH)2. Atomic adsorption spectroscopy, AAS, and scanning electron microscopy, SEM, were used for elemental analysis and determination of Pt content. The deposited Pt species were dried, calcined or reduced and were subjected to temperature programmed reduction, TPR. After degassing at increased temperature, the Pt dispersion was determined by hydrogen chemisorption at -60 C.
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Národní úložiště šedé literatury : Nalezeno 54 záznamů.   1 - 10dalšíkonec  přejít na záznam:
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