کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
56778 47095 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of the microstructure of carbon nanotubes on the oxidative dehydrogenation of ethylbenzene to styrene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Influence of the microstructure of carbon nanotubes on the oxidative dehydrogenation of ethylbenzene to styrene
چکیده انگلیسی

The effect of graphitization of carbon nanotubes (CNTs) on the oxidative dehydrogenation of ethylbenzene to styrene was studied. An elimination of functional groups was observed by treating the catalyst under inert gas at temperatures below 1100 °C, while its microstructure and reactivity in TPO experiments did not change significantly. A decrease in the initial catalytic performances was observed, but the functional groups can be regenerated during the catalytic reaction, thus leading to a significant improvement in the catalytic activity. Annealing CNTs above 1500 °C leads to a well graphitisized wall structure of CNTs with a nearly oxygen-free surface with a low number of defects. The obtained samples show low but stable catalytic performances, indicating that the oxygenated active sites cannot be regenerated on this well-organized and low defective surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 150, Issues 1–2, 26 February 2010, Pages 49–54
نویسندگان
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