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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Modeling of kinetics and deactivation in the direct epoxidation of propene over gold-titania catalysts
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
نویسندگان
, , ,