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The influence of SiO2 doping on the Ni/ZrO2 supported catalyst for hydrogen production through the glycerol steam reforming reaction

Charisiou, N.D., Papageridis, K.N., Siakavelas, G., Sebastian, V., Hinder, S.J., Baker, M.A., Polychronopoulou, K. and Goula, M.A. (2018) The influence of SiO2 doping on the Ni/ZrO2 supported catalyst for hydrogen production through the glycerol steam reforming reaction Catalysis Today, 319. pp. 206-219.

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The glycerol steam reforming (GSR) reaction for H2 production was studied comparing the performance of Ni supported on ZrO2 and SiO2-ZrO2 catalysts. The surface and bulk properties were determined by ICP, BET, XRD, TPD, TPR, TPO, XPS, SEM and STEM-HAADF. It was suggested that the addition of SiO2 stabilizes the ZrO2 monoclinic structure, restricts the sintering of nickel particles and strengthens the interaction between Ni2+ species and support. It also removes the weak acidic sites and increases the amount of the strong acidic sites, whereas it decreases the amount of the basic sites. Furthermore, it influences the gaseous products’ distribution by increasing H2 yield and not favouring the transformation of CO2 in CO. Thus, a high H2/CO ratio can be achieved accompanying by negligible value for CO/CO2. From the liquid products quantitative analysis, it was suggested that acetone and acetaldehyde were the main products for the Ni/Zr catalyst, for 750oC, whereas for the Ni/SiZr catalyst allyl alcohol was the only liquid product for the same temperature. It was also concluded that the Ni/SiZr sample seems to be more resistant to deactivation however, for both catalysts a substantial amount of carbon exists on the catalytic surface in the shape of carbon nanotubes and amorphous carbon.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Charisiou, N.D.
Papageridis, K.N.
Siakavelas, G.
Sebastian, V.
Hinder, S.J.
Polychronopoulou, K.
Goula, M.A.
Date : 25 April 2018
DOI : 10.1016/j.cattod.2018.04.052
Copyright Disclaimer : © 2018 Published by Elsevier B.V. This article is made available under the CC-BY-NC-ND license 4.0
Uncontrolled Keywords : Hydrogen production; Glycerol steam reforming; Silica-modified zirconia; Nickel catalysts; Carbon nanotubes; Deactivation
Related URLs :
Depositing User : Clive Harris
Date Deposited : 01 May 2018 07:17
Last Modified : 26 Apr 2019 02:08

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