Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/244414
Type: Artigo
Title: Effects of the activation method on the performance of base metal catalysts prepared by wet impregnation for toluene hydrogenation in liquid phase
Author: Suppino, R. S.
Landers, R.
Cobo, A. J. G.
Abstract: The present work aims to study the effects of the activation method on the performance of base metal catalysts for toluene hydrogenation in liquid phase. For this, catalysts of Fe, Co and Ni supported on gamma-Al2O3 were prepared by wet impregnation from chlorinated precursors and reduced by formaldehyde. The prepared catalysts were activated ex situ at 773 K or in situ at 523 K both under H-2 and characterized by N-2 physisorption, SEM + EDX, TEM, XPS and TPR techniques. Catalytic tests were conducted in a slurry Parr reactor at 373 K under H-2 pressure of 5 MPa. The results indicate the formation of metal hydroxides during the catalysts preparation, which are not reduced by the formaldehyde. The ex situ activation seems able to reduce both hydroxides of Fe and Ni, but there is no evidence of reduction in the case of Co hydroxide. Co and Ni catalysts present higher activities when not activated, whereas the in situ activation increases the activity of the Fe catalyst.
The present work aims to study the effects of the activation method on the performance of base metal catalysts for toluene hydrogenation in liquid phase. For this, catalysts of Fe, Co and Ni supported on γ-Al2O3 were prepared by wet impregnation from chlorinated precursors and reduced by formaldehyde. The prepared catalysts were activated ex situ at 773 K or in situ at 523 K both under H2 and characterized by N2 physisorption, SEM + EDX, TEM, XPS and TPR techniques. Catalytic tests were conducted in a slurry Parr reactor at 373 K under H2 pressure of 5 MPa. The results indicate the formation of metal hydroxides during the catalysts preparation, which are not reduced by the formaldehyde. The ex situ activation seems able to reduce both hydroxides of Fe and Ni, but there is no evidence of reduction in the case of Co hydroxide. Co and Ni catalysts present higher activities when not activated, whereas the in situ activation increases the activity of the Fe catalyst.
Subject: Alumina
Hidrogenação
Catalisadores
Country: Hungria
Editor: Springer
Citation: Effects Of The Activation Method On The Performance Of Base Metal Catalysts Prepared By Wet Impregnation For Toluene Hydrogenation In Liquid Phase. Springer, v. 114, p. 295-309 FEB-2015.
Rights: fechado
Identifier DOI: 10.1007/s11144-014-0790-3
Address: https://link.springer.com/article/10.1007/s11144-014-0790-3
Date Issue: 2015
Appears in Collections:IFGW - Artigos e Outros Documentos
FEQ - Artigos e Outros Documentos

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