کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
68341 48512 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidative dehydrogenation of ethane to ethylene over NiO loaded on high surface area MgO
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Oxidative dehydrogenation of ethane to ethylene over NiO loaded on high surface area MgO
چکیده انگلیسی

The oxidative dehydrogenation of ethane over NiO-loaded MgO with high surface area was carried out using a fixed-bed flow reactor at 600 °C under atmospheric pressure.At 600 °C, the oxidative dehydrogenation of ethane (C2H6/O2 = 1) without dilution with an inert gas resulted in C2H6 conversion of 68.8% and a high C2H4 selectivity of 52.8%, which corresponds to a C2H4 yield of 36.3%. In addition, the catalytic activity did not decrease for at least 10 h. X-ray photoelectron spectra of the catalysts after the reaction exhibited that the initial valence state of Ni2+ (NiO) was maintained during the oxidative dehydrogenation of ethane. However, when NiO-loaded MgO was reduced with H2 prior to the reaction, C2H4 selectivity decreased to nearly zero and high CO and H2 selectivities were observed with the C2H6 conversion of 50 %, indicating that partial oxidation of C2H6 proceeded. Therefore, it seems important to keep Ni species as an oxide phase on the support, and for this purpose, use of the high surface area of MgO is essential.

NiO loaded high surface area magnesium oxide afforded 36.8% of ethylene in the oxidative dehydrogenation of thane without dilution. Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 260, Issues 1–2, 15 December 2006, Pages 144–151
نویسندگان
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