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Study of catalytic hydrogenation performance for the Pd/CeO2 catalysts.
- Source :
- International Journal of Chemical Reactor Engineering; Feb2022, Vol. 20 Issue 2, p251-259, 9p
- Publication Year :
- 2022
-
Abstract
- Pd/CeO<subscript>2</subscript> catalysts with different metallic Pd loading were synthesized by impregnation method. The physicochemical properties of prepared Pd/CeO<subscript>2</subscript> catalysts and corresponding precursors were studied by XRD, XPS, H<subscript>2</subscript>-TPD and H<subscript>2</subscript>-TPR. Moreover, the catalytic performance of the Pd/CeO<subscript>2</subscript> catalysts was investigated via gas phase benzene hydrogenation reaction at the temperature of 100–200 °C under atmosphere pressure. Results show that the catalytic performance of prepared Pd/CeO<subscript>2</subscript> catalysts is directly related to the metallic Pd content. The amounts of active metallic Pd and adsorbed-desorbed hydrogen species on Pd/CeO<subscript>2</subscript> catalysts increase with the increasing metallic Pd loading from 1.0 to 3.0%, while the numbers of them are slightly reduced on Pd/CeO<subscript>2</subscript>(3.5) catalyst. Furthermore, metallic Pd is highly dispersed on the nano-CeO<subscript>2</subscript> supports, therefore, the prepared Pd/CeO<subscript>2</subscript> catalysts present good gas phase benzene catalytic hydrogenation performance. At 200 °C, the benzene conversion over the Pd/CeO<subscript>2</subscript> catalysts with different metallic Pd loading follows the rule: Pd/CeO<subscript>2</subscript>(3.0) > Pd/CeO<subscript>2</subscript>(3.5) > Pd/CeO<subscript>2</subscript>(2.5) > Pd/CeO<subscript>2</subscript>(2.0) > Pd/CeO<subscript>2</subscript>(1.5) > Pd/CeO<subscript>2</subscript>(1.0), corresponding values are 94.3, 96.4, 89.9, 82.8, 72.7, 42.6 and 94.3%. And the cyclohexane selectivity is 100% on all prepared Pd/CeO<subscript>2</subscript> catalysts. [ABSTRACT FROM AUTHOR]
- Subjects :
- CATALYSTS
CATALYTIC hydrogenation
CYCLOHEXANE
HYDROGENATION
BENZENE
Subjects
Details
- Language :
- English
- ISSN :
- 15426580
- Volume :
- 20
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- International Journal of Chemical Reactor Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 155364131
- Full Text :
- https://doi.org/10.1515/ijcre-2021-0144