Boron nitride supported Pt catalyst for selective hydrogenation
Resource
Catalysis Letters 102 (3-4): 223-227
Journal
Catalysis Letters
Journal Volume
102
Journal Issue
3-4
Pages
223-227
Date Issued
2005
Author(s)
Abstract
A novel boron nitride (BN) supported Pt catalyst showed a special catalytic behavior in the selective hydrogenation of α-, β-unsaturated aldehyde compared with a traditional Pt/γ-Al 2O3 catalyst. The hydrogenation of crotonaldehyde was carried out using a mixture of H2/crotonaldehyde molar ratio 59 at temperature range from 30 to 300 °C. Pt/BN gave near 100% selectivity of butyraldehyde in the temperature range of 30-100 °C while Pt/γ-Al 2O3 showed a favorable selectivity of crotyl alcohol. Butyraldehyde was the main product on Pt/BN because the C=C bond of crotonaldehyde was preferentially hydrogenated at low temperature due to the support effect. BN possess graphite-like structure as an inert support and may repel C=O end of crotonaldehyde during hydrogenation. The products distribution transited from kinetic to thermodynamic control with increasing temperature, and finally the hydrogenation became thermodynamically dominant at 250-300°C. © 2005 Springer Science+Business Media, Inc.
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Type
journal article
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