کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
52811 46888 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performances of new Kieselguhr-supported transition metal oxide catalysts in propane oxydehydrogenation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Performances of new Kieselguhr-supported transition metal oxide catalysts in propane oxydehydrogenation
چکیده انگلیسی

Kieselguhr-supported transition metal oxides (where metal is V, Cr, Mn, Co, Ni or Mo) were prepared by impregnation method and characterized by BET (surface area), XPS (binding energies) and XRF (elemental). They were tested in oxidative dehydrogenation of propane at 350–500 °C and atmospheric pressure. At similar reaction condition, propane conversions along the first row (V, Cr, Mn, Co and Ni) formed a maxima. The maximum conversion was exhibited by either manganese- or cobalt-based catalyst depending on the reaction temperature. At low conversions, CO2 was the sole product. When the conversion was increased, propylene, ethylene and CO were also produced. At 500 °C, manganese-based catalysts exhibited the highest olefins yields of 6.5%. The low olefins yields have been associated with low level of interaction between the support and active components, as evidenced by XPS. The results show that the new Kieselguhr-supported transition metal oxide catalysts are active in oxidative dehydrogenation of propane but their redox properties need to be modified to improve the olefins selectivities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 7, Issue 2, February 2006, Pages 79–85
نویسندگان
, , , , , , , , ,