Ethanol dehydrogenation on copper catalysts with ytterbium stabilized tetragonal ZrO₂ support

详细信息    查看全文

• 作者：S. G. Chuklina ; A. I. Pylinina ; L. I. Podzorova…
• 关键词：bioethanol ; alcohol dehydrogenation ; oxide catalysts ; zirconia ; copper ; containing catalysts
• 刊名：Russian Journal of Physical Chemistry A, Focus on Chemistry
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：90
• 期：12
• 页码：2370-2376
• 全文大小：1,028 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1531-863X
• 卷排序：90

文摘

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.