Abstract
A series of Pd/γ-Al2O3 catalysts were prepared by wet impregnation method at different pH and time. The effect of metal distribution and dispersion on the catalyst reducibility in liquid-phase hydrogenation of olefins was studied. The samples were characterized by BET, XRD, ICP, FESEM, CO-chemisorption and H2-TPR techniques. Liquid-phase hydrogenation reaction was carried out in a three-phase trickle bed reactor to evaluate the performance of the catalyst samples. The best catalyst performance was attributed to a combination of its desirable characteristics, that is, high reducibility at lower temperatures, high Pd dispersion and an egg-shell Pd distribution which increase the accessibility of the reactants to Pd active sites in this diffusion-limited reaction.
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Howeizi, J., Taghvaei-Ganjali, S., Malekzadeh, M. et al. Effect of the distribution and dispersion of palladium nanoparticles on the reducibility and performance of Pd/Al2O3 catalyst in liquid-phase hydrogenation of olefins. Reac Kinet Mech Cat 130, 777–795 (2020). https://doi.org/10.1007/s11144-020-01795-8
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DOI: https://doi.org/10.1007/s11144-020-01795-8