Nickel Supported on AlCeO3 as a Highly Selective and Stable Catalyst for Hydrogen Production via the Glycerol Steam Reforming Reaction

Charisiou, Nikolaos D., Siakavelas, Georgios I., Dou, Binlin, Sebastian, Victor, Hinder, Steven, Baker, Mark, Polychronopoulou, Kyriaki and Goula, Maria A. (2019) Nickel Supported on AlCeO3 as a Highly Selective and Stable Catalyst for Hydrogen Production via the Glycerol Steam Reforming Reaction Catalysts, 9 (5).

Text Manuscript_Catalysts.doc - Accepted version Manuscript Available under License Creative Commons Attribution. Download (12MB)

Abstract

In this study, a critical comparison between two low metal (Ni) loading catalysts is presented, namely Ni/Al2O3 and Ni/AlCeO3 for the glycerol steam reforming (GSR) reaction. The surface and bulk properties of the catalysts were evaluated using a plethora of techniques, such as N2 adsorption/desorption, ICP-AES, XRD, XPS, SEM/EDX, TEM, CO2-TPD, NH3-TPD, H2-TPR. Carbon deposited on the catalysts surfaces was probed using TPO, SEM and TEM. It is demonstrated that Ce-modification of Al2O3 induces an increase of the surface basicity and Ni dispersion. These features lead to a higher conversion of glycerol to gaseous products (60% to 80%), particularly H2 and CO2, enhancement of WGS reaction and a higher resistance to coke deposition. Allyl alcohol was found to be the main liquid product for the Ni/AlCeO3 catalyst, the production of which ceases over 700 oC. It is also highly significant that the Ni/AlCeO3 catalyst demonstrated stable values for H2 yield (2.9-2.3) and selectivity (89-81%), in addition to CO2 (75-67%) and CO (23-29%) selectivity during a (20h) long time-on-stream study. Following the reaction, SEM/EDX and TEM analysis showed heavy coke deposition over the Ni/Al2O3 catalyst, whereas for the Ni/AlCeO3 catalyst TPO studies showed the formation of more defective coke, the latter being more easily oxidized

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :	Name Email ORCID Charisiou, Nikolaos D. Siakavelas, Georgios I. Dou, Binlin Sebastian, Victor Hinder, Steven S.Hinder@surrey.ac.uk Baker, Mark M.Baker@surrey.ac.uk Polychronopoulou, Kyriaki Goula, Maria A.
Date :	1 May 2019
DOI :	10.3390/catal9050411
Copyright Disclaimer :	© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords :	Nickel catalysts, ceria, alumina, glycerol steam reforming, H2 production
Depositing User :	Charlene King
Date Deposited :	29 May 2019 09:52
Last Modified :	29 May 2019 09:52
URI:	http://epubs.surrey.ac.uk/id/eprint/851903

Actions (login required)

View Item

Downloads