Abstract
Exclusive hydrogenation of benzaldehyde to benzyl alcohol in gas phase continuous operation (393–413 K, 1 atm) was achieved over Au/Al2O3, Au/TiO2 and Au/ZrO2. Synthesis of Au/Al2O3 by deposition–precipitation generated a narrower distribution (2–8 nm) of smaller (mean = 4.3 nm) Au particles relative to impregnation (1–21 nm, mean = 7.9 nm) with increased H2 uptake under reaction conditions and higher benzaldehyde turnover. Switching reactant carrier from ethanol to water resulted in a significant enhancement of selective hydrogenation rate over Au/Al2O3 with 100% benzyl alcohol yield, attributed to increased available reactive hydrogen. This response extends to reaction over Au/TiO2 and Au/ZrO2.
Original language | English |
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Pages (from-to) | 187-191 |
Number of pages | 5 |
Journal | Catalysis Communications |
Volume | 46 |
Early online date | 23 Dec 2013 |
DOIs | |
Publication status | Published - 10 Feb 2014 |
Keywords
- benzaldehyde
- selective hydrogenation
- benzyl alcohol
- Au/Al2O3
- water as carrier