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Effect of Pt Particle Size and Phosphorous Addition on Furfural Hydrogenation Over Pt/Al.sub.2O.sub.3
Pt/Al.sub.2O.sub.3 catalysts with different Pt particle sizes and after phosphorous deposition were studied for liquid phase catalysed furfural hydrogenation. The activity and selectivity were related to various physico-chemical properties studied by scanning transmission electron microscopy, N.sub....
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| Published in: | Catalysis letters 2022-04, Vol.152 (4), p.980 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Pt/Al.sub.2O.sub.3 catalysts with different Pt particle sizes and after phosphorous deposition were studied for liquid phase catalysed furfural hydrogenation. The activity and selectivity were related to various physico-chemical properties studied by scanning transmission electron microscopy, N.sub.2 physisorption, .sup.31P nuclear magnetic resonance, diffuse reflectance Fourier transform infrared spectroscopy and attenuated total reflectance infrared spectroscopy. The results indicate that the large particles obtained upon calcination of 1 wt% Pt/Al.sub.2O.sub.3 at 600 °C exhibited higher turnover frequency per surface Pt; nonetheless, the overall activity decreased due to the loss of surface Pt upon sintering. While in certain cases phosphorous can act as promoter, the addition of this element to Pt/Al.sub.2O.sub.3 resulted in catalyst poisoning, which was ascribed to Pt encapsulation/blockage effects related to formation of AlPO.sub.4. Finally, gradual deactivation of Pt/Al.sub.2O.sub.3 was observed over five consecutive catalytic cycles which was caused by Pt sintering (from 0.6 to 2.0 nm) as well as by irreversible adsorption of organic reaction intermediates. Graphic |
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| ISSN: | 1011-372X 1572-879X |
| DOI: | 10.1007/s10562-021-03685-7 |