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New approaches to improving catalyst stability over Pt/ceria during ethanol steam reforming: Sn addition and CO2 co-feeding

Paper ID Volume ID Publish Year Pages File Format Full-Text
47384 46470 2010 12 PDF Available
Title
New approaches to improving catalyst stability over Pt/ceria during ethanol steam reforming: Sn addition and CO2 co-feeding
Abstract

To promote long-term stability of Pt/CeO2 catalyst for ethanol steam reforming, two approaches were examined. Sn was added to Pt to suppress carbon formation. Although the catalyst with high Sn content exhibited improved stability, acetaldehyde selectivity was prohibitive. DRIFTS experiments revealed that Sn inhibited the ability of Pt to facilitate steam-assisted forward acetate decomposition reaction to carbonate, the precursor to CO2 formation. However, CO2 co-feeding was more effective, not only in promoting long-term catalyst stability, but also in maintaining high H2 selectivity. DRIFTS experiments indicate that the kinetic influence of CO2 can be explained as a competition with ethanol for adsorption sites, leading to a suppression in the rate of formation of coke precursors.

Keywords
Hydrogen production; Ethanol steam reforming; Pt–Sn/CeO2 catalyst; Deactivation mechanism; Carbon formation; CO2 co-feeding
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New approaches to improving catalyst stability over Pt/ceria during ethanol steam reforming: Sn addition and CO2 co-feeding
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 96, Issues 3–4, 7 June 2010, Pages 387–398
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
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