کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10244444 | 47685 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modeling of kinetics and deactivation in the direct epoxidation of propene over gold-titania catalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
A reaction model was developed for the epoxidation of propene oxide over gold-titania catalysts. This model involves the formation of a bidentate propoxy species on titania after the adsorption of propene, which is activated by gold. Aided by a peroxide species produced from hydrogen and oxygen on a gold nanoparticle, this species can reactively desorb from the catalyst to produce propene oxide. A reversible catalyst deactivation occurs by a consecutive oxidation of the bidentate propoxy species to carbonate species. The kinetic model is able to give a good description of the experimentally observed catalytic performance in the low-temperature range (up to 365 K), where the selectivity of the catalyst is high.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 236, Issue 1, 15 November 2005, Pages 153-163
Journal: Journal of Catalysis - Volume 236, Issue 1, 15 November 2005, Pages 153-163
نویسندگان
T. Alexander Nijhuis, Tracy Q. Gardner, Bert M. Weckhuysen,