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Glycerol Steam Reforming for Hydrogen Production over Nickel Supported on Alumina, Zirconia and Silica Catalysts

Charisiou, ND, Papageridis, KN, Siakavelas, G, Tzounis, L, Kousi, K, Baker, Mark, Hinder, Steven, Cabeza, VS, Polychronopoulou, K and Goula, MA (2017) Glycerol Steam Reforming for Hydrogen Production over Nickel Supported on Alumina, Zirconia and Silica Catalysts Topics in Catalysis.

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Abstract

The aim of the work was to investigate the influence of support on the catalytic performance of Ni catalysts for the glycerol steam reforming reaction. Nickel catalysts (8 wt%) supported on Al2O3, ZrO2, SiO2 were prepared by the wet impregnation technique. The catalysts’ surface and bulk properties, at their calcined, reduced and used forms, were determined by ICP, BET, XRD, NH3-TPD, CO2-TPD, TPR, XPS, TEM, TPO, Raman, SEM techniques. The Ni/Si sample, even if it was less active for T <600 °C, produces more gaseous products and reveals higher H2 yield for the whole temperature range. Ni/Zr and Ni/Si catalysts facilitate the WGS reaction, producing a gas mixture with a high H2/CO molar ratio. Ni/Si after stability tests exhibits highest values for total (70%) and gaseous products (45%) glycerol conversion, YH2 (2.5), SH2 (80%), SCO2 (65%), H2/CO molar ratio (6.0) and lowest values for SCO (31%), SCH4 (3.1%), CO/CO2 molar ratio (0.48) among all samples. The contribution of the graphitized carbon formed on the catalysts follows the trend Ni/Si (I D /I G = 1.34) < Ni/Zr (I D /I G = 1.08) < Ni/Al (I D /I G = 0.88) and indicates that the fraction of different carbon types depends on the catalyst’s support nature. It is suggested that the type of carbon is rather more important than the amount of carbon deposited in determining stability. It is confirmed that the nature of the support affects mainly the catalytic performance of the active phase and that Ni/SiO2 can be considered as a promising catalyst for the glycerol steam reforming reaction.

Item Type: Article
Subjects : Mechanical Engineering Science
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Charisiou, NDUNSPECIFIEDUNSPECIFIED
Papageridis, KNUNSPECIFIEDUNSPECIFIED
Siakavelas, GUNSPECIFIEDUNSPECIFIED
Tzounis, LUNSPECIFIEDUNSPECIFIED
Kousi, KUNSPECIFIEDUNSPECIFIED
Baker, MarkM.Baker@surrey.ac.ukUNSPECIFIED
Hinder, StevenS.Hinder@surrey.ac.ukUNSPECIFIED
Cabeza, VSUNSPECIFIEDUNSPECIFIED
Polychronopoulou, KUNSPECIFIEDUNSPECIFIED
Goula, MAUNSPECIFIEDUNSPECIFIED
Date : 16 May 2017
Identification Number : 10.1007/s11244-017-0796-y
Copyright Disclaimer : The final publication is available at Springer via http://dx.doi.org/10.1007/s11244-017-0796-y
Uncontrolled Keywords : Hydrogen production - Glycerol steam reforming - Nickel catalysts - Alumina - Zirconia - Silica
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 09 May 2017 13:12
Last Modified : 25 Jul 2017 14:32
URI: http://epubs.surrey.ac.uk/id/eprint/814130

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