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Open AccessFeature PaperArticle

The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol

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Laboratory of Alternative Fuels and Environmental Catalysis (LAFEC), Department of Chemical Engineering, University of Western Macedonia, 50100 Kozan, Greece
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Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
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Dipartimento di Chimica Industriale “Toso Montanari”, Università degli Studi di Bologna, 40136 Bologna, Italy
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Chemical and Environmental Engineering Department, Instituto de Nanociencia de Aragón (INA) and Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50018 Zaragoza, Spain
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Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBERBBN, 28029 Madrid, Spain
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Department of Mechanical Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, UAE
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Center for Catalysis and Separations, Khalifa University of Science and Technology, Abu Dhabi 127788, UAE
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(7), 790; https://doi.org/10.3390/catal10070790
Received: 19 June 2020 / Revised: 8 July 2020 / Accepted: 14 July 2020 / Published: 15 July 2020
(This article belongs to the Special Issue The Design and Development of Precious Metal Catalysts)
A promising route for the energetic valorisation of the main by-product of the biodiesel industry is the steam reforming of glycerol, as it can theoretically produce seven moles of H2 for every mole of C3H8O3. In the work presented herein, CeO2–Al2O3 was used as supporting material for Ir, Pd and Pt catalysts, which were prepared using the incipient wetness impregnation technique and characterized by employing N2 adsorption–desorption, X-Ray Diffraction (XRD), Temperature Programmed Reduction (TPR), Temperature Programmed Desorption (TPD), X-ray Photoelectron Spectroscopy (XPS) and Transmission Electron Microscopy (TEM). The catalytic experiments aimed at identifying the effect of temperature on the total conversion of glycerol, on the conversion of glycerol to gaseous products, the selectivity towards the gaseous products (H2, CO2, CO, CH4) and the determination of the H2/CO and CO/CO2 molar ratios. The main liquid effluents produced during the reaction were quantified. The results revealed that the Pt/CeAl catalyst was more selective towards H2, which can be related to its increased number of Brønsted acid sites, which improved the hydrogenolysis and dehydrogenation–dehydration of condensable intermediates. The time-on-stream experiments, undertaken at low Water Glycerol Feed Ratios (WGFR), showed gradual deactivation for all catalysts. This is likely due to the dehydration reaction, which leads to the formation of unsaturated hydrocarbon species and eventually to carbon deposition. The weak metal–support interaction shown for the Ir/CeAl catalyst also led to pronounced sintering of the metallic particles. View Full-Text
Keywords: glycerol steam reforming; Pt catalysts; Ir catalysts; Pd catalysts; ceria-alumina support glycerol steam reforming; Pt catalysts; Ir catalysts; Pd catalysts; ceria-alumina support
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MDPI and ACS Style

Charisiou, N.D.; Siakavelas, G.I.; Papageridis, K.N.; Motta, D.; Dimitratos, N.; Sebastian, V.; Polychronopoulou, K.; Goula, M.A. The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol. Catalysts 2020, 10, 790. https://doi.org/10.3390/catal10070790

AMA Style

Charisiou ND, Siakavelas GI, Papageridis KN, Motta D, Dimitratos N, Sebastian V, Polychronopoulou K, Goula MA. The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol. Catalysts. 2020; 10(7):790. https://doi.org/10.3390/catal10070790

Chicago/Turabian Style

Charisiou, Nikolaos D.; Siakavelas, Georgios I.; Papageridis, Kyriakos N.; Motta, Davide; Dimitratos, Nikolaos; Sebastian, Victor; Polychronopoulou, Kyriaki; Goula, Maria A. 2020. "The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol" Catalysts 10, no. 7: 790. https://doi.org/10.3390/catal10070790

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