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Glycerol steam reforming on Ru catalysts supported on core-shell metal–ceramic microcomposites developed by a microwave-induced hydrothermal method

Paper ID Volume ID Publish Year Pages File Format Full-Text
39201 45812 2015 8 PDF Available
Title
Glycerol steam reforming on Ru catalysts supported on core-shell metal–ceramic microcomposites developed by a microwave-induced hydrothermal method
Abstract

•Core–shell metal–ceramic microcomposites were prepared from Al metal particles.•Microwave-induced hydrothermal oxidation (MW-HTO) in H2O constructed Al2O3@Al.•MW-HTO in Mg precursor solutions led to the formation of MgAl2O4@Al structures.•Structures were applied for support of Ru catalysts for glycerol reforming to hydrogen.•Catalysts exhibited superior catalytic properties due to facilitated heat transport.

Glycerol steam reforming on Ru catalysts supported on core-shell metal–ceramic microcomposites, MgAl2O4@Al and Al2O3@Al consisting of Al metal core encapsulated by high surface area porous metal oxide shell, is studied. The support structures were prepared by microwave-induced hydrothermal surface oxidation (MW-HTO) of Al metal particles at low temperatures and atmospheric pressure. The type and concentration of Mg precursor for MW-HTO had significant effects on morphological and physicochemical properties of the resulting core-shell microstructures. Ru/MgAl2O4@Al and Ru/Al2O3@Al catalysts exhibited 2–3-folds higher glycerol conversion turnover rates than conventional Ru/MgAl2O4 and Ru/Al2O3 counterparts at similar Ru dispersions, most likely due to facilitation of heat transport through these multifunctional catalyst support structures. The structures and properties of the catalysts were characterized by SEM, TEM, XRD, EDX, N2 adsorption, and CO chemisorption. The core-shell structures were stable for an extended time of glycerol steam reforming reactions (823 K and 24 h), indicating that the metal oxide shells were persistent on the surface and at the metal/oxide interface. These composite structures may provide opportunity for the catalytic reactions requiring high intensity of heat flux such as endothermic fuel reforming for hydrogen production in microreactors for fuel cells.

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Keywords
Glycerol reforming; Hydrogen production; Ru catalysts; Metal–ceramic microcomposite; Microwave synthesis
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Glycerol steam reforming on Ru catalysts supported on core-shell metal–ceramic microcomposites developed by a microwave-induced hydrothermal method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 499, 25 June 2015, Pages 197–204
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us