کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
42625 45934 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pd-promoted WOx/ZrO2 catalysts: Characterization and catalytic activity for n-butane isomerization
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Pd-promoted WOx/ZrO2 catalysts: Characterization and catalytic activity for n-butane isomerization
چکیده انگلیسی

The need for environmental friendly catalysts for alkane isomerization has prompted research on the WOx/ZrO2 system. Suitable promoters may improve its activity and stability. We investigated the effect of palladium on WOx/ZrO2 redox properties and catalytic activity for n-butane isomerization. Pd favoured the reduction of WxOy clusters already at RT (redox cycles O2/H2) and in reduced samples EPR identified W5+ surface species.Increasing Pd dispersion increased the catalytic activity. Leached and pre-reduced catalysts resulted to have the highest activity, suggesting that the most active species are WxOy clusters anchored to zirconia surface and interacting with near Pd hydride. For n-butane isomerization Pd-promotion is as effective as Pt-promotion.

We investigated the palladium effect on WOx/ZrO2 redox properties and catalytic activity for n-butane isomerization. Pd favoured the reduction of WxOy already at RT and in reduced samples EPR identified three W5+ surface species. Leached and pre-reduced catalysts showed the highest activity, suggesting that the most active species are WxOy clusters anchored to zirconia surface and interacting with near Pd hydride.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 351, Issue 1, 15 December 2008, Pages 29–35
نویسندگان
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