کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
49320 46736 2016 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Synthesis, characterization and correlation with the catalytic activity of efficient mesoporous niobia and mesoporous niobia–zirconia mixed oxide catalyst system
ترجمه فارسی عنوان
سنتز، خصوصیات و همبستگی با فعالیت کاتالیزوری نایوبیا مزوپور موثر و سیستم کاتالیست اکسید مخلوط نایوبیا-زیرکونیا مزوپور
کلمات کلیدی
مزوپوروس؛ اکسید مخلوط؛ نایوبیا-زیرکونیا؛ Beckmann؛ مدل کونگ
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Mesoporous niobia–zirconia catalyst has been prepared.
• The change in acidity by varying niobia–zirconia ratios was observed.
• Acidity was explained by Kung's model.
• High conversion of cyclohexanone oxime has been demonstrated.

Mesoporous mixed oxide has always remained as a subject of interest due to diffusion relaxation and generation of new surface potential and acidity by mixing of different stoichiometries of metal oxide. To deliver more insight on niobia based catalyst, herein, we have synthesized mesoporous niobia and five different mole ratios of niobia–zirconia mixed oxide. The catalysts were characterized by XRD, N2-physisorption, FTIR, UV–Vis and NH3-TPD techniques. Less distorted NbO6 octahedra and NbOH or Nb–OH–Zr are found to act as Bronsted center responsible for reaction. The results established the role of Kung model to generate acidic sites in mesoporous mixed oxide.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 77, 5 March 2016, Pages 42–46
نویسندگان
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