کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
39822 45837 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Selective oxidation of formaldehyde to formic acid over supported vanadia catalysts
ترجمه فارسی عنوان
اکسیداسیون انتخابی فرمالدئید به اسید فرمیک بر روی کاتالیزورهای وانادیایی پشتیبانی شده
کلمات کلیدی
اکسیداسیون فرمالدئید، اسید فرمیک، متیل فرمیت، کاتالیزورهای وانادیا پشتیبانی شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• The nature of the support plays significant role in CH2O oxidation over vanadium catalysts.
• Anatase is the most suitable support for monolayer vanadium species formation.
• Monolayer vanadium species are beneficial for formaldehyde oxidation to formic acid.

The effect of support and different vanadia species present at different vanadium loadings on the catalytic performance of supported vanadia in the oxidation of formaldehyde to formic acid was examined. The catalysts with vanadium supported on SiO2, Al2O3, ZrO2, and TiO2 were prepared by impregnation. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, UV–vis diffuse reflectance spectroscopy, and the temperature-programmed reduction technique. All catalysts and supports were tested in the oxidation of formaldehyde at 120 °C. It was found that activity in the oxidation of formaldehyde to formic acid is determined by the structure of vanadia species and the selectivity is determined by the coverage of support surface by these species. TiO2 (anatase) is the most suitable support for the formation of monolayer vanadium species which are the most active in the oxidation of formaldehyde to formic acid.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 475, 5 April 2014, Pages 98–108
نویسندگان
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