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  • 1
    ISSN: 1573-935X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The influence of the nature of the oxide support on selectivity of Fe catalysts in Fischer-Tropsch synthesis at atmospheric pressure has been studied. It was found that selectivity towards lower olefins increases with increasing basicity of the oxide support. It is suggested that this effect is due to participation of basic oxide sites in hydrogen-atom abstraction from the surface metal-alkyl complex.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-935X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The effect of added potassium on the catalytic properties of an Fe/ZrO2 catalyst in the hydrogenation of CO have been studied. A kinetic criterion is proposed for the participation of the basic centers in the catalyst in the olefin formation step. Use of this criterion indicates that the basic centres of the catalyst considerably accelerate the conversion of surface alkyl groups to olefins during the hydrogenation of CO.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and experimental chemistry 32 (1996), S. 34-37 
    ISSN: 1573-935X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A study was carried out on the effect of temperature and reaction mixture composition on the activity and selectivity of an Fe/Al2O3 CO hydrogenation catalyst relative to lower olefins at atmospheric pressure. An increase in the CO concentration was found to lead to increased selectivity relative to olefins not only due to a diminution in the hydrogenating capacity of the catalyst but also an increase in the rate of the reaction step yielding olefins.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-935X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Iron admixtures (0.1 %) raise the activity of zirconium dioxide catalyst in regard to the formation of C2-C4 olefins from CO and H2. Manifestation of the promoting effect in the synthesis of isobutylene (in contrast to C2-C3 olefins) requires close contact between the metal and ZrO2. Iron promoted zirconium dioxide is more selective for olefins than is ZrO2 with nickel admixtures.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 17 (1981), S. 291-295 
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Роль палладия при малых концентрациях CO состоит в инициировании радикальноцепного процесса. При больших концентрациях CO реакция протекает только на поверхности гетерогенного катализатора и эффект промотирования палладием связан в основном со специфической активацией на нём окиси углерода.
    Notes: Abstract At small concentrations of CO, palladium initiates a radical-chain process. At high CO concentrations CO oxidation occurs only on the surface of the heterogeneous catalyst and the effect of palladium is mainly due to the specific activation of carbon monoxide on the palladium surface.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 18 (1981), S. 411-414 
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Роль сернистого ангидрила при окислении CO на палладий-ванадиевом катализаторе в присутствии SO2 состоит в переводе быстрого гетерогенно-гомогенного процесса в более медленный гетерогенный. Аналогичное действие оказывают и большие концентрации CO. При протекании процесса по гетерогенному механизму повышение концентрации SO2, увеличивая степень восстановленности как палладированного, так и непалладированного контактов, способствует окислению CO.
    Notes: Abstract The function of SO2 in CO oxidation on Pd-V catalysts is to transform a rapid heterogeneous-homogeneous process to a slower heterogeneous one. High concentrations of CO also exert the same effect. In the heterogeneous process an increase in the SO2 concentration increasing the degree of catalyst reduction with and without Pd additives, promotes CO oxidation.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 37 (1988), S. 175-180 
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Изучено гидрирование CO на кобальт-рутильных и кобальт-анатазных катализаторах с различным содержанием кобаль-та при 480–570 К. На кобальт-рутильных контактах при 478–523 К образуются углеводороды C1–C15. В начальный период работы катализаторов на температурной кривой наблюдается гистерезис против часовой стрелки. Кобальт-анатазные катализаторы не проявляют активности вплоть до 670 К.
    Notes: Abstract CO hydrogenation on cobalt-rutile and cobalt-anatase catalysts with various amounts of cobalt at 480–570 K has been studied. C1–C15 hydrocarbons are formed on cobalt-rutile catalysts at 478–523 K. During the initial period of catalyst operation a counterclockwise hysteresis is observed. Cobalt-anatase catalysts remain inactive up to 670 K.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 21 (1982), S. 63-66 
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Исследована кинетнка глубокого окисления метана и сернистого газа на сложном ванадиевом катализаторе с добавкой и без добавки палладия, а также на палладии, нанесённом на силикагель. Сернистый газ повышает скорость окисления метана, не изменяя механизм его окисления, а метан не влияет на процесс окисления сернистого ангидрида на всех исследованных катализаторах.
    Notes: Abstract The kinetics of deep oxidation of CH4 and SO2 over complex vanadium catalysts with and without palladium additives and over silica-supported palladium has been studied. Sulfur dioxide increases the rate of CH4 oxidation, not affecting the reaction mechanism, whereas CH4 does not effect SO2 oxidation on the catalysts studied.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Изучено гидрирование CO на никель-рутильном и никельанатазном катализаторах при 470–520 К, Катализатор на рутиле обладает на порядок большей удельной активностью; на нем образуются углеводороды C1−C15; на анатазном — только парафины C1−C3. При 310–330 К происходит унос никеля из никель-анатазного контакта, а содержание никеля в рутильном катализаторе практически не изменяется.
    Notes: Abstract CO hydrogenation over Ni-rutile and Ni-anatase catalysts has been studied at 470–520 K. Activity of the rutile catalyst is by an order of magnitude higher and it produces C1−C15-hydrocarbons; the anatase sample yields only C1−C3-paraffins. At 310–330 K the Ni-anatase catalyst loses nickel, while the nickel content in the Ni-rutile sample remains practically unchanged.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Исследован процесс гидрирования CO на катализаторах CO−TiO2, в которых дисперсность кобальта близка, а доля рутила, f, в смесях рутил-анатаз варьировалась от нуля до единицы. Наибольшей суммарной активностью и селективностью по жидким углеводородам обладает контакт, для которого f=0,7.
    Notes: Abstract CO hydrogenation on Co−TiO2 catalysts with similar cobalt dispersity and rutile amount within f=0–1·0 in a rutile-anatase mixture has been studied. The highest activity and selectivity to liquid hydrocarbons is observed for the catalyst with f=0.7.
    Type of Medium: Electronic Resource
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