کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
41800 45900 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogenation of pyrene using Pd catalysts supported on tungstated metal oxides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Hydrogenation of pyrene using Pd catalysts supported on tungstated metal oxides
چکیده انگلیسی

A series of Pd catalyst supported on tungstated metal oxides (Pd/W–MOx) were prepared and applied for pyrene hydrogenation, and the role of acid sites of supports was investigated. Among Pd/W–MOx catalysts, Pd/W–TiO2 showed the highest activity which was comparable to those of Pd/BEA, Pd/Y and Pd/SiO2–Al2O3. As for the Pd catalysts supported on metal oxides without tungstate (Pd/MOx), the hydrogenation activity became higher with the increase in the acid amount of supports measured by calorimetric measurement of ammonia adsorption. The important role of acid sites on hydrogenation activity was demonstrated. On the other hand, the hydrogenation activity of Pd/W–MOx catalysts was not correlated to the acid amount of supports measured by ammonia adsorption. On-site generation of protonic acid on tungstated metal oxide supports was estimated from kinetic analysis of reduced W species in the presence of hydrogen by in situ UV–visible measurement. From a good correlation between the kinetic parameters of on-site protonic acid formation and the hydrogenation activity, the important role of protonic acid formation on tungstated metal oxide supports was clarified.

Figure optionsDownload high-quality image (71 K)Download as PowerPoint slideResearch highlights▶ Pd/W–TiO2 shows high activity for pyrene hydrogenation. ▶ Activity is comparable to Pd/SiO2–Al2O3. ▶ Hydrogenation activity is controlled by on-site formation of protonic acid.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 387, Issues 1–2, 20 October 2010, Pages 166–172
نویسندگان
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