کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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44288 | 46013 | 2006 | 6 صفحه PDF | دانلود رایگان |
Supported Pd, Pt, Ru and Ir catalysts doped with Cd, Sn, P, Sb, Bi, Se, Ca and Ce have been studied in a liquid phase isomerization of 3-methyl-3-buten-1-ol (isoprenol) into 3-methyl-2-buten-1-ol (prenol) in a continuous reactor in the temperature range of 60–100 °C. Silica and different aluminas were used as supports. The catalyst containing 0.5% Pd–0.05% Se–0.3% Ce/SiO2 exhibited the best performance. A 45% conversion of isoprenol at selectivity of 93–94% to prenol was recorded in 100 h run in hydrogen flow. The catalysts were characterized by SEM, XRD and XPS methods.The role of selenium consists in the stabilization of Pd in a partially oxidized state Pdn+, depressing completely hydrogenation activity, and thus selenium promotes a shift of double bond. Addition of Ce oxide improves dispersion of palladium species affecting catalyst activity significantly.
Journal: Applied Catalysis A: General - Volume 297, Issue 2, 6 January 2006, Pages 231–236