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Comparative study on steam and oxidative steam reforming of ethanol over 2KCo/ZrO2 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
53819 46986 2015 10 PDF Available
Title
Comparative study on steam and oxidative steam reforming of ethanol over 2KCo/ZrO2 catalyst
Abstract

•The addition of oxygen prevents carbon formation on 2KCo/ZrO2 catalyst.•The addition of oxygen causes the oxidation of cobalt phases of 2KCo/ZrO2 catalyst.•Selectivity to desired products over 2KCo/ZrO2 catalyst is lower in OSRE than SRE.•Temperature to achieve complete EtOH conversion over 2KCo/ZrO2 is lower in SRE.

The steam rreforming and oxidative steam reforming of ethanol were studied over 2KCo/ZrO2 catalyst which was prepared by support impregnation with cobalt nitrate-citric acid solution. The catalyst was characterized by N2 adsorption, H2 chemisorption, X-ray fluorescence, Raman spectroscopy, temperature-programmed reduction, temperature-programmed oxidation. The results indicate that the optimum EtOH/O2 molar ratio of 1/0.9 corresponds to the oxygen amount which prevents coke formation on the catalyst, when a constant molar ratio of H2O/EtOH = 9/1. However, the presence of oxygen causes oxidation of metallic particles which leads to oxidized cobalt active phases that behave poorly in the reformation reactions. Thus, compared to the SRE, both activity and selectivity to desired products over the 2KCo/ZrO2 catalyst in the OSRE process is definitely lower and the higher temperature for complete conversion of ethanol is required.

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Keywords
Hydrogen production; Oxidative ethanol steam reforming; Steam reforming of ethanol; Cobalt-based catalyst; Zirconia support
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Comparative study on steam and oxidative steam reforming of ethanol over 2KCo/ZrO2 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 242, Part A, 15 March 2015, Pages 50–59
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