کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
56658 47090 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transient study of the dry reforming of methane over Pt supported on different γ-Al2O3
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Transient study of the dry reforming of methane over Pt supported on different γ-Al2O3
چکیده انگلیسی

CO2 reforming of methane has been studied over Pt/Al2O3 model catalysts in a temperature range of 600–800 °C using steady-state and transient methods (Transient Response Method (TRM) and DRIFT-MS). Pt-supported catalysts were prepared using two different alumina (γ-Al2O3(S) Sasol-Puralox and a synthesized γ-Al2O3(N) with nanofibrous structure). Catalysts and supports were characterized by conventional methods (XRD, TEM, ABET, XPS) before and after reaction. Pt0 species are present in the catalysts, with a higher relative contribution for the catalyst that has a nanostructured support. Pt/γ-Al2O3(N) catalyst presented the best performance in reactivity and showed a low rate of carbon formation and a minimal water production. From TRM and DRIFT-MS results it can be concluded that, when CO2 and CH4 are fed separately into the reaction system, they are activated over the catalytic surface. Besides, when both reactants are fed contemporaneously the presence of CHX species promotes the CO2 activation that is responsible for the reforming reaction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 149, Issues 3–4, 30 January 2010, Pages 380–387
نویسندگان
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