
New Journal of Chemistry p. 2435 - 2441 (2020)
Update date:2022-08-17
Topics:
Valencia, Diego
Zenteno, Citlalli
Morales-Gil, Perla
Díaz-García, Leonardo
Gómora-Herrera, Diana
Palacios-González, Eduardo
Aburto, Jorge
We synthesized a series of new Ni catalysts supported on mesoporous silica KIT-5. The metal loading on this support was varied (0.9-7.0 wt% NiO). The catalysts were characterized by N2 physisorption, powder XRD, XRF spectrometry, UV-vis DRS, H2-TPR, HRTEM and FT-IR with CO. The mesoporous structure is maintained in all the catalytic materials. The increase in the Ni loading resulted in the formation of crystalline phases at the KIT-5 surface. The catalysts were tested in hydrodeoxygenation (HDO) of palmitic acid. The catalytic activity increased with the metal loading, reaching a maximum by using the catalyst with 1.8 wt% NiO. On the other hand, calculation of kinetic parameters indicated the effective utilization of catalytically active Ni particles in the HDO process. Formation of oxygen-free products was higher for the catalyst with higher metal loading in this series. These catalytic materials were compared with a series of Ni catalysts supported on carbon, finding that the Ni/KIT-5 catalysts were much more active in the HDO reaction. These new catalysts supported on the mesoporous silica KIT-5 exhibited high activity with low metal loadings. This feature makes them attractive for their application in the HDO of fatty acids.
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