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  • 1975-1979  (7)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Dependence of the catalytic properties of cobalt molybdate in propylene oxidation on the surface reduction and oxygen bond energy (1977)
    Springer
    Reaction kinetics and catalysis letters 7 (1977), S. 187-191 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract С применением импульсной и калориметрической методик исследована зависимость скоростей частных рекцций окисления пропилена и знергии связи кислорода от степени восстановленности молибдата кобальта. Найдено, что при восстановлении образца селективность по акролеину и знергия связи кислорода возрастают. Стационарное состояние в исследованных условиях характеризуется степенью восстановленности поверхности 22% и наличием однородного кислорода с прочностью связи 85 ккал/моль.
    Notes: Abstract The dependences of the tate of partial propylene oxidation and of oxygen bond energy on the degree of cobalt molybdate reduction has been investigated by pulse and caloremetric methods. It has been found that upon reduction, the selectivity to acrolein and the oxygen bond energy increase. The steady state under the conditions examined is characterized by 22% surface reduction and the presence of uniform oxygen with a bond energy of about 85 kcal/mol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061837
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Heat of oxygen adsorption on nickel catalysts (1977)
    Springer
    Reaction kinetics and catalysis letters 7 (1977), S. 115-119 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Проведено измерение теплот адсорбции кислорода на ряде нанесенных никелевых катализаторов, средний, средний размер кристаллов никеля в которых изменялся от 8 до 200 Å. В пределах погрешности эксперимента теплоты адсорбции кислорода на всех катализаорах пии 350°C оказались одинаковыми и равными 100±5ккал/моль.
    Notes: Abstract The heat of oxygen adsorption has been measured on a series of supported nickel catalysts with variations in the mean size of nickel crystals from 8 to 200 Å. Within the experimental accuracy, the heat of oxygen adsorption on all catalysts at 35°C proved to be equal to 100±5kcal/mol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02068563
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Steady state catalytic properties and oxygen binding energy of cadmium-molybdenum catalysts in methanol oxidation (1977)
    Springer
    Reaction kinetics and catalysis letters 7 (1977), S. 229-233 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract На нормальном молибдате кадмия продуктами окисления метанола являются в основном CO2 и H2. После введения в него избыточной MoO3 до соотношения Mo/Cd=1, 2 окисление метанола идет до формальдегида и окиси углерода по последовательной схеме. Энергия связи кислорода в стационарном состоянии для 1-го образца на 30 ккал/моль выше, чем для второго, а энергии активации скоростей превращения метанола, соответственно, равны 11,5 и 20 ккал/моль.
    Notes: Abstract On normal cadmium molybdate the products of methanol oxidation are primarily CO2 and H2. After the introduction of excess MoO3 to reach Mo/Cd=1.2, methanol is oxidized to formaldehyde and carbon monoxide via a consecutive scheme. The oxygen binding energy in the steady state for the first sample is by 30 kcal/mol higher than that for the second catalyst. The activation energies of methanol conversion are 11.5 and 20 kcal/mol, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061844
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  • 4
    Electronic Resource
    Electronic Resource
    Calorimetric study of oxygen bond strength in the surface layer of manganese dioxide (1977)
    Springer
    Reaction kinetics and catalysis letters 7 (1977), S. 133-137 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Калориметрическим методом при 100° и 200°C определены теплоты отрыва кислорода от поверхности MnO2 (q′s) в процессе ее восстановления окисью углерола и теплоты реокисления восстановленной поверхности газообразным кислородом (qs). При 200°C как q′s, так и qs близки (с точностью до знака) к энтальнии перехода MnO2 в Mn2O3. При 100°C восстановление MnO2 протекает без изменение состояния не только самой поверхности, но и всего приповерхностного слоя окисла.
    Notes: Abstract The heat of oxygen removal from the MnO2 surface (q′s) during its reduction by carbon monoxide and the heat of reoxidation of the reduced surface by gaseous oxygen (qs) have been determined by a calorimetric method at 100 and 200°C. At 200°C both q′s and qs are close to the enthalpy of MnO2 transformation to Mn2O3. At 100°C the reduction of MnO2 takes place without any distinct formation of a phase of the lower oxide, however, it leads to significant changes in both the surface and the subsurface layer of the oxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061828
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Steady state of a bismuth-tin catalyst in the oxidative dehydrodimerization of propylene (1979)
    Springer
    Reaction kinetics and catalysis letters 10 (1979), S. 19-23 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Импульсным и калориметрическим методами изучены зависимоти скоростей окисли-тельной дегидродимеризации и полного окисления пропилена и энергии связи кисло-рода от степени восстановления висмутоловянного окисного катализатора. Показано, что в стационарном состоянии поверхность образца восстановлена на 80% и характе-ризуется наличием однородного кислорода с прочностью связи 90 ккап/моль.
    Notes: Abstract The effect of the extent of reduction of a bismuth-tin oxide catalyst on the rate of oxidative dehydrodimerization and total oxidation of propylene and on the oxygen binding energy has been studied by pulse and calorimetric techniques. It is shown that the steady state surface is reduced by 80% and is characterized by the presence of one type of oxygen with a binding energy of 90 kcal/mol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067506
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  • 6
    Electronic Resource
    Electronic Resource
    Activity, selectivity and oxygen binding energy on stationary surfaces of iron- and chromium-molybdenum catalysts in methanol oxidation (1975)
    Springer
    Reaction kinetics and catalysis letters 3 (1975), S. 209-214 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Сделано сравнение теплот адсорбции кислорода на железо- и хром-молибденовых катализаторах, приведенных в стационарное состояние при окислении метанола с одинаковыми концентрациями реагентов в газовой фазе. Показано, что при высокой энергии связи кислорода (75–90 ккал/моль) активность катализатора зависит в основном от активации молекулы метанола при её адсорбции. Величина изменения теплоты адсорбции по мере покрытия поверхности кислородом не влияет существенно на избирательность.
    Notes: Abstract A comparison was made of the heat of oxygen adsorption on iron- and chromium-molybdenum catalysts brought into a stationary state in methanol oxidation with the same concentration of reactants in the gas phase. It has been shown that at high oxygen binding energy (75–90 kcal/mol) the catalyst's activity depends mainly on methanol activation during its adsorption. Variations in the heat of oxygen adsorption with surface coverage do not appreciably affect the selectivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187516
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  • 7
    Electronic Resource
    Electronic Resource
    Interaction of phosphomolybdovanadium heteropolyacids with hydrazine hydrate studied by a calorimetric method (1976)
    Springer
    Reaction kinetics and catalysis letters 4 (1976), S. 405-411 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Измерены теплоты взаимодействия VO 2 + и гетерополикислот H3+nPMo12−nVnO40 (n=1,2,3,6) с N2H4.
    Notes: Abstract The heats of interaction of VO 2 + and of heteropolyacids H3+nPMo12−nVnO40 (n=1,2,3,6) with N2H4 have been measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02342582
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    Paper (German National Licenses)
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