کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
52269 | 46867 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Methane selective oxidation to formaldehyde with Fe-catalysts supported on silica or incorporated into the support
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
The selective oxidation of methane to formaldehyde was performed on iron (0.1–0.5 wt%) catalysts supported on silica prepared by the sol–gel method with (“Fe-dissolved”) or without (“Fe-precipitated”) pH control. SEM and TEM permits to differentiate the preparation methods which lead to a homogeneous composition sample or to the formation of iron isolated species, respectively. The Mössbauer analyses confirm the higher metal dispersion with pH control method. The catalytic activity was carried out between 400 and 750 °C. The “Fe-precipitated” catalysts display higher methane conversion but selectivity towards methanol, whereas the “Fe-dissolved” catalyst leads to the maximum formaldehyde yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 864–869
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 864–869
نویسندگان
Carlos Alberto Guerrero Fajardo, Daniel Niznansky, Yvonne N’Guyen, Claire Courson, Anne-Cécile Roger,