کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
52977 | 46892 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isotopic transient study of methanol decomposition over noble metal/ceria catalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
Methanol decomposition reaction was studied over combustion-synthesized noble metal (Pt, Pd, Rh)/ceria catalysts using the steady-state isotopic transient kinetic analysis (SSITKA) method. The 13C-containing reactants and products were monitored following a 12CH3OH/Ar/He → 13CH3OH/He switch. Average life-time and concentration of adsorbed intermediate species which lead to CO, and overall reaction rate at 220 °C, were determined. Significant amounts of active intermediate species were formed on the ceria support or/and metal-ceria interface. A clear concave shape of the curve of the semilogarithmic plot of the molar fraction of CO versus time was indicative of a parallel mechanism followed for its formation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 10, Issue 5, 25 January 2009, Pages 682–686
Journal: Catalysis Communications - Volume 10, Issue 5, 25 January 2009, Pages 682–686
نویسندگان
George Avgouropoulos,