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Effect of MnOx in the catalytic stabilization of Co2MnO4 spinel during the ethanol steam reforming reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
39258 45815 2015 11 PDF Available
Title
Effect of MnOx in the catalytic stabilization of Co2MnO4 spinel during the ethanol steam reforming reaction
Abstract

•Co-based spinel-structured Co2MnO4 was assessed as a catalyst for ESR reaction.•The spinel structure of Co2MnO4 exhibited extremely stable performance until 71 h.•The Co2MnO4/SBA-15 exhibited the highest catalytic activity for ESR at 700 °C.•Spinel structured-Co2MnO4 is a major contribution to the absolute catalytic activity.•Manganese oxide in the spinel structure of Co2MnO4 provided oxygen to the cobalt catalytic active sites.

Co-based spinel-structured Co2MnO4 was assessed as a catalyst for the ethanol steam reforming reaction. Ethanol conversion over spinel-structured Co2MnO4/SBA-15 was comparable to that over CoxOy/SBA-15 and CoxOy/MnxOy/SBA-15 after a reduction treatment. The spinel structure of Co2MnO4 exhibited extremely stable performance until 71 h, whereas the catalytic activities of the CoxOy/SBA-15 and CoxOy/MnxOy/SBA-15 were reduced by carbon deposition involving different reforming mechanisms. The catalytic stability for the reforming reaction was closely related to the stability of the cobalt oxidation states through the assistance of manganese oxides and its spinel structure. The Co2MnO4/SBA-15 exhibited the highest activity for the reforming reaction at 700 °C. Cobalt in the spinel structure of Co2MnO4 is believed to make a major contribution to the absolute catalytic activity because there is little or no catalytic deactivation induced by aggregation between their particles compared to the impregnated cobalt ingredients. On the other hand, manganese oxide in the spinel structure of Co2MnO4 was suggested to provide oxygen to the cobalt catalytic active sites, resulting in increases in hydrogen production and the suppression of CO generation.

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Keywords
Spinel-structure; Co2MnO4; Hydrogen production; Ethanol steam reforming; CoxOy/SBA-15; CoxOy/MnxOy/SBA-15
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Effect of MnOx in the catalytic stabilization of Co2MnO4 spinel during the ethanol steam reforming reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 503, 25 August 2015, Pages 165–175
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
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us