Ethanol dehydrogenation on copper catalysts with ytterbium stabilized tetragonal ZrO2 support
| Autor: | S. G. Chuklina, I. I. Mikhalenko, L. I. Podzorova, A. I. Pylinina, N. A. Mikhailina |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polyvinylpyrrolidone 010405 organic chemistry Inorganic chemistry chemistry.chemical_element Activation energy 010402 general chemistry 01 natural sciences Copper 0104 chemical sciences Catalysis law.invention Chemical engineering chemistry law medicine Cubic zirconia Dehydrogenation Texture (crystalline) Physical and Theoretical Chemistry Crystallization medicine.drug |
| Zdroj: | Russian Journal of Physical Chemistry A. 90:2370-2376 |
| ISSN: | 1531-863X 0036-0244 |
| DOI: | 10.1134/s0036024416120074 |
| Popis: | The physicochemical and catalytic properties of Cu-containing crystalline zirconia, obtained via sol–gel synthesis in the presence of Yb3+ ions and polyvinylpyrrolidone, are studied. DTG/DSC, TEM, XRD and BET methods are used to analyze the crystallization, texture, phase uniformity, surface and porosity of ZrO2 nanopowders. It is shown that increasing the copper content (1, 3, and 5 wt % from ZrO2) raises the dehydrogenation activity in the temperature range of 100–400°C and lowers the activation energy of acetaldehyde formation. It is found that the activity of all Cu/t-ZrO2 catalysts grows under the effects of the reaction medium, due to the migration and redispersion of copper. |
| Databáze: | OpenAIRE |
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