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The effect of Ni addition onto a Cu-based ternary support on the H₂ production over glycerol steam reforming reaction

Polychronopoulou, Kyriaki, Charisiou, Nikolaos D, Papageridis, Kyriakos N, Sebastian, Victor, Hinder, Steven, Dabbawala, Aasif A, AlKhoori, Ayesha A., Baker, Mark and Goula, Maria A. (2018) The effect of Ni addition onto a Cu-based ternary support on the H₂ production over glycerol steam reforming reaction Nanomaterials, 8 (11), 931. pp. 1-27.

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Abstract

In the present study, Ni/Ce-Sm-xCu (x = 5, 7, 10 at.%) catalysts were prepared using microwave radiation coupled with sol-gel and followed by wetness impregnation method for the Ni incorporation. Highly dispersed nanocrystallites of CuO and NiO on the Ce-Sm-Cu support were found. Increase of Cu content seems to facilitate the reducibility of the catalyst according to the H₂ temperature-programmed reduction (H₂-TPR). All the catalysts had a variety of weak, medium and strong acid/basic sites that regulate the reaction products. All the catalysts had very high XC3H8O3 for the entire temperature (400–750 °C) range; from ≈84% at 400 °C to ≈94% at 750 °C. Ni/Ce-Sm-10Cu catalyst showed the lowest XC3H8O3-gas implying the Cu content has a detrimental effect on performance, especially between 450–650 °C. In terms of H₂ selectivity (SH2) and H₂ yield (YH2), both appeared to vary in the following order: Ni/Ce-Sm-10Cu ˃ Ni/Ce-Sm-7Cu ˃ Ni/Ce-Sm-5Cu, demonstrating the high impact of Cu content. Following stability tests, all the catalysts accumulated high amounts of carbon, following the order Ni/Ce-Sm-5Cu ˂ Ni/Ce-Sm-7Cu ˂ Ni/Ce-Sm-10Cu (52, 65 and 79 wt.%, respectively) based on the thermogravimetric analysis (TGA) studies. Raman studies showed that the incorporation of Cu in the support matrix controls the extent of carbon graphitization deposited during the reaction at hand.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Polychronopoulou, Kyriaki
Charisiou, Nikolaos D
Papageridis, Kyriakos N
Sebastian, Victor
Hinder, StevenS.Hinder@surrey.ac.uk
Dabbawala, Aasif A
AlKhoori, Ayesha A.
Baker, MarkM.Baker@surrey.ac.uk
Goula, Maria A.
Date : 8 November 2018
DOI : 10.3390/nano8110931
Copyright Disclaimer : This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Uncontrolled Keywords : Ni supported catalysts; ternary oxides; Sm-Cu-doped CeO₂; glycerol steam reforming; H₂ production
Depositing User : Melanie Hughes
Date Deposited : 02 Nov 2018 11:41
Last Modified : 13 Jun 2019 14:29
URI: http://epubs.surrey.ac.uk/id/eprint/849818

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