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Article
The particular characteristics of the active sites of MoS2, WS2 catalysts in thiophene hydrodesulfurization
It was reported in earlier studies that a linear correlation existed between the total sulfur exchange capacity and thiophene hydrodesulfurization activity of different, alumina- or silica-supported molybdenum...
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Article
The Conversion of Butadiene on Thiophene Hydrodesulfurization Catalysts
The production of thiophene via heterocyclization of butadiene with sulfur (hcycl.) has been studied in the interaction of butadiene with sulfided, alumina supported nickel (Ni6), molybdena–alumina (Mo6) and n...
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Article
On the surface coverage of alumina by molybdenum-oxide in nickel - and cobalt-promoted MoOx/Al2O3 catalysts
The chemisorption of CO2 has been studied on alumina-supported Co-and Ni-promoted molybdenum-oxide (CoMo, NiMo) and, besides those, on monometallic Co and Ni. Chemisorbed amounts on the monometallic samples were ...
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Chapter
Chemodifferentiation of Papavereae from Coasts of the Black-Sea to the Atlantic
The tribe Papavereae contains two polycarpic species endemic to the western coasts of Europe and Atlantic: Papaver rupifragum and Meconopsis cambrica. Chemical characteristics (oxoprotopines) of P. rupifragum aff...
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Article
Adsorption of methane and ethane, 2. Studies of metal blacks in a dynamic system
The irreversible adsorption of methane and ethane increases with increasing temperature on Pt, Pd and Rh blacks. Data indicate a one-carbon attachment of ethane on Pt and Pd. A two-carbon attachment of ethane ...
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Article
Conversion of ethene and propene adsorbed on Pt foil
The conversion of ethene and propene has been studied in the process of adsorption on Pt foil and in adsorbed state. Mainly C−C bond cleavage and limited C−C bond formation was observed in 323–523 K temperatur...
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Article
Effect of H2S-uptake on the conversion of cyclohexene on Ru- and Pd-promoted molybdena-alumina catalysts
The effect of H2S on the activity and selectivity of catalysts (Ru/Al2O3, Pd/Al2O3 and Ru and Pd promoted molydena-alumina) was different (on differnt catalysts and different conversions of cyclohexene). Ru-conta...
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Article
Adsorption data extracted from kinetic equations of some hydrocarbon conversions on nickel
Adsorption equilibrium constants and adsorption enthalpies have been calculated from kinetic data of cyclohexane dehydrogenation and ethane hydrogenolysis on metallic nickel. From these data the bond strength ...
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Article
Sulfur uptake by molybdena based catalysts: Effect of different substances
The uptake of H2S has been determined for Al2O3 supported Mo, RuMo and PdMo catalysts, exposed previously to cyclohexanol, cyclohexene or thiophene. The amounts of H2S-uptake were compared with those taken up by ...
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Article
Catalytic conversion of C6-hydrocarbons on MVIII-containing molybdena-alumina
Sulfieded MVIII-promoted Mo/Al2O3 catalysts are widely used in hydrotreatment reactions [1–3]. A synergic effect found between catalytic activity of MVIII-metal and Mo was explained by some authors [4–6] by charg...
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Article
On the problem of different active sites in monomolecular heterogeneous catalytic reactions
It is shown by means of kinetic-adsorption data that the dehydrogenation and dehydration of propanol-2 on chromia occur on different active sites, while sites are presumably similar for propanol-2 and cyclohex...
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Article
Note on the kinetics of dehydrogenation of cyclohexane
Kinetic data available for Pt and Ni suggest doubts about the acceptance of the method applied by V.I. Anikeev et al. [1] as basis for “Kinetic Laws” for cyclohexane dehydrogenation on Pd/C catalysts.
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Chapter
Analysis of Specific, Unsaturated Plant Fatty Acids
For the selective epoxidation of specific fatty acids we expected to find such seed oils, containing cis-5-icosenoic (Eicosenoic) acid as the main component. On the base our examination we had chosen a plant w...
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Chapter
GC/MS Investigation on Different Fatty Acids from Seeds of Some Medicinal Plants
Seed oils of various species belonging mainly to the ASTERACEAE, BORAGINACEAE, CUCURBITACEAE, ONAGRACEAE and PAPAVERACEAE families were investigated. The characteristic composition of fatty acids in plant seed...
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Article
Hydrogenolysis of 3-methylpentane over group VIII metals
Determination of the ζ “fragmentation factor” in a wide conversion range over Group VIII metals and Re indicated that the “single” character of the hydrogenolysis of 3-methylpentane is an inherent property of ...
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Chapter and Conference Paper
Effect of Cyclodextrin on Growth Processes and Productivity of Plants
Seeds of various cultivated plants have been treated by cyclo-dextrins before germination. The effect of treatment have been studied during whole life cycles of plants in growth chambers as well as in open air...
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Chapter and Conference Paper
Thermofractography of Cyclodextrin-Complexes by Classical and Overpressured TLC Techniques
Cyclodextrin complexes and simple mechanical mixtures can be rapidly differentiated from each other /e.g. in case of essential oils and pharmacons/ by thenaofractography and by classical or overpressured thin-...
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Article
On the homologation of pentanes on Ru, Re, Os and Ir/SiO2 catalysts
Homologation of n-pentane and cyclopentane results in formation of benzene on Ru, Os, Re and Ir/SiO2 catalysts. Formation of benzene can be explained by the insertion of carbene into terminal vinilic carbon follo...
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Article
On the structure sensitivity of ethane hydrogenolysis on Ni catalysts
The effect of dispersity of Ni catalysts has been investigated in the hydrogenolysis of ethane. The kinetic order in hydrogen and the apparent activation energy are dependent on the dispersity. The experimenta...
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Article
On the pattern of hydrogenolysis of hexane isomers over four Group VIIIB metals
The hydrogenolysis patterns of five hexane isomers have been compared over Rh, Pd, Ir and Pt. The selectivity of rupture of various C−C bond types is different for various metals. The “fingerprint-like” patter...
