Search Results - "Velvarská, Romana"

Using Mg‐Al Mixed Oxide and Reconstructed Hydrotalcite as Basic Catalysts for Aldol Condensation of Furfural and Cyclohexanone by Kikhtyanin, Oleg, Kadlec, David, Velvarská, Romana, Kubička, David

“…This study presents results on aldol condensation of furfural and cyclohexanone in presence of Mg‐Al hydrotalcite‐derived materials as solid basic catalysts at…”
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Raman Spectroscopy as Molybdenum and Tungsten Content Analysis Tool for Mesoporous Silica and Beta Zeolite Catalysts by Velvarská, Romana, Tišler, Zdeněk, Raichlová, Veronika, Hidalgo-Herrador, José Miguel

“…Raman spectroscopy was used for the quantitative determination of Mo and W in Mo- and W-supported mesoporous silica (Mo/SBA-15 and W/SBA-15, respectively) and…”
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Oxalic Acid as a Hydrogen Donor for the Hydrodesulfurization of Gas Oil and Deoxygenation of Rapeseed Oil Using Phonolite-Based Catalysts by Herrador, José Miguel Hidalgo, Fratczak, Jakub, Tišler, Zdeněk, de Paz Carmona, Hector, Velvarská, Romana

“…The use of renewable local raw materials to produce fuels is an important step toward optimal environmentally friendly energy consumption. In addition, the use…”
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Rapid determination of diesel fuel properties by near-infrared spectroscopy by Hradecká, Ivana, Velvarská, Romana, Jaklová, Karolína Dlasková, Vráblík, Aleš

“…•NIR spectroscopy determine simultaneously kinematic viscosity, CFPP, PP, content of sulfur, mono-, di-, and poly-aromatics in diesel fuel.•Effective, rapid,…”
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The influence of long-term exposure of Mg–Al mixed oxide at ambient conditions on its transition to hydrotalcite by Kocík, Jaroslav, Hájek, Martin, Tišler, Zdeněk, Strejcová, Kateřina, Velvarská, Romana, Bábelová, Monika

“…The paper is focused on the study of long-term aging of Mg–Al mixed oxides, which causes the rebuilding of the hydrotalcite layered structure in the presence…”
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Characterization of Modified Natural Minerals and Rocks for Possible Adsorption and Catalytic Use by Strejcová, Kateřina, Tišler, Zdeněk, Svobodová, Eliška, Velvarská, Romana

“…This study focused on natural materials such as clinoptilolite (CLI), metakaolin (MK), marlstone (MRL) and phonolite (PH). Clinoptilolite is one of the most…”
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Solvent-Free Synthesis of Jasminaldehyde in a Fixed-Bed Flow Reactor over Mg-Al Mixed Oxide by Zahra Gholami, Zdeněk Tišler, Pavla Vondrová, Romana Velvarská, Kamil Štěpánek

“…In spite of the rapid developments in synthesis methodologies in different fields, the traditional methods are still used for the synthesis of organic…”
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Near-infrared spectroscopy to determine cold-flow improver concentrations in diesel fuel by Velvarská, Romana, Vráblík, Aleš, Hidalgo-Herrador, José Miguel, Černý, Radek

“…[Display omitted] •Near-infrared spectroscopy determine cold-flow improver concentrations in diesel fuel.•Fast and accurate control of cold-flow improver…”
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Key Role of Precursor Nature in Phase Composition of Supported Molybdenum Carbides and Nitrides by Tišler, Zdeněk, Velvarská, Romana, Skuhrovcová, Lenka, Pelíšková, Lenka, Akhmetzyanova, Uliana

“…In this work, we studied the effect of molybdenum precursors and the synthesis conditions on the final phase composition of bulk and supported molybdenum…”
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CoMn Catalysts Derived from Hydrotalcite-Like Precursors for Direct Conversion of Syngas to Fuel Range Hydrocarbons by Zahra Gholami, Zdeněk Tišler, Romana Velvarská, Jaroslav Kocík

“…Two different groups of CoMn catalysts derived from hydrotalcite-like precursors were prepared through the co-precipitation method, and their performance in…”
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Near-infrared spectroscopy for determining the oxidation stability of diesel, biodiesel and their mixtures by Velvarská, Romana, Vráblík, Aleš, Fiedlerová, Marcela, Černý, Radek

“…The oxidation stability of diesel, biodiesel and their mixtures is commonly examined by PetroOxy, Rancimat or thermal techniques, but these analytical methods…”
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Physico-Chemical Properties of MgGa Mixed Oxides and Reconstructed Layered Double Hydroxides and Their Performance in Aldol Condensation of Furfural and Acetone by Kikhtyanin, Oleg, Čapek, Libor, Tišler, Zdeněk, Velvarská, Romana, Panasewicz, Adriana, Diblíková, Petra, Kubička, David

“…MgGa layered double hydroxides (Mg/Ga = 2-4) were synthesized and used for the preparation of MgGa mixed oxides and reconstructed hydrotalcites. The properties…”
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Comparison of the properties and catalytic activity of commercially and laboratory prepared Mg/Al mixed oxides in aldol condensation of cyclohexanone with furfural by Kadlec, David, Tišler, Zdeněk, Velvarská, Romana, Pelíšková, Lenka, Akhmetzyanova, Uliana

“…In recent years, for deeper understanding of the behavior of various heterogeneous catalysts, aldol condensation of acetone and furfural has been researched in…”
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Mesityl Oxide Reduction by Using Acid-Modified Phonolite Supported NiW, NiMo, and CoMo Catalysts by José Miguel Hidalgo Herrador, Zdeněk Tišler, Jaroslav Kocík, Jakub Frątczak, Ivana Hradecká, Romana Velvarská, Héctor de Paz Carmona

“…Mesityl oxide is standardly used to produce methyl iso butyl ketone but it can be also used to produce other useful compounds. Three catalysts were used for…”
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Rapid Models for Predicting the Low‐Temperature Behavior of Diesel by Vráblík, Aleš, Velvarská, Romana, Štěpánek, Kamil, Pšenička, Martin, Hidalgo, José Miguel, Černý, Radek

“…The cold filtration plugging point (CFPP) is the method most commonly applied to characterize the low‐temperature behavior of diesel and its components…”
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Synthesis of sulfur-free Co-Mo nitride catalysts for the hydrotreating of atmospheric gasoil and co-processing of rapeseed oil by Skuhrovcová, Lenka, de Paz Carmona, Héctor, Tišler, Zdeněk, Svobodová, Eliška, Michálková, Martina, Strejcová, Kateřina, Velvarská, Romana, Akhmetzyanova, Uliana

“…•Nitridation temperature play a crucial role in catalyst properties and activity.•At the optimised conditions, Co-Mo nitride catalyst show a HDS efficiency up…”
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Near-infrared spectroscopy as a rapid tool for water content analysis in the partial oxidation of ethanol by Velvarská, Romana, Fiedlerová, Marcela, Hidalgo-Herrador, José Miguel, Tisler, Zdene;k

“…The oxidation of ethanol to acetaldehyde was previously investigated in a continuous flow bench scale reactor using a zirconium-oxide-supported vanadium…”
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Oxalic acid-mediated catalytic transfer hydrodeoxygenation of waste cooking oil by Hidalgo-Herrador, José Miguel, Frątczak, Jakub, Velvarská, Romana, de Paz Carmona, Hector

“…[Display omitted] •The catalytic transfer hydrogenation of used vegetable cooking oil was achieved.•The decomposition of oxalic acid resulted in hydrogen…”
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Clinoptilolite foams prepared by alkali activation of natural zeolite and their post-synthesis modifications by Tisler, Zdenek, Horacek, Jan, Safar, Jan, Velvarska, Romana, Peliskova, Lenka, Kocik, Jaroslav, Gherib, Yosra, Marklova, Kristyna, Bulanek, Roman, Kubicka, David

“…Alkaline activated aluminosilicate materials have been studied mainly in the building industry as a substitute for concretes, ceramic materials and thermal…”
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