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Methane steam reforming for hydrogen production using low water-ratios without carbon formation over ceria coated Ni catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43689 45983 2008 9 PDF Available
Title
Methane steam reforming for hydrogen production using low water-ratios without carbon formation over ceria coated Ni catalysts
Abstract

There are many advantages for hydrogen production from the catalytic methane steam reforming reaction (MSR) using low water to methane ratios. However, conventional Ni based catalysts suffer from severe carbon deposition under these conditions. A typical supported Ni catalyst at water to methane ratios <1 at 800 °C shows rapid deactivation (within few hours). Incorporation of CeO2 is known to offer a kinetic resistance to carbon deposition for many hydrocarbon oxidation reactions because of its facilitated redox activity. As a result, a study of blending ceria into a supported Ni catalyst by a number of deposition methods has been carried out. Catalyst characterization including DRIFTS, XRD, TPR, TGA, TEM and EDX suggests the prime importance of an intimate contact between Ni and CeO2 in reducing the extent of carbon deposition during the reforming reaction, which critically depends on the preparation method in catalyst synthesis. As a result, a stable and high level of hydrogen production with no significant carbon deposition for over 110 h is demonstrated over the same Ni commercial catalyst pre-coated with ceria using a sol–gel method, which offers the best interface for the reaction.

Graphical abstractThere are many advantages for hydrogen production from catalytic methane steam reforming reaction using low water to methane ratios (<1). However, conventional Ni catalysts suffer from severe carbon deposition leading to a rapid deactivation. We show a stable and high level of hydrogen production with no carbon deposition over Ni commercial catalyst pre-coated with ceria using a sol–gel method.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Sol–gel method; Ceria; Ni catalyst; Methane steam reforming (MSR); Carbon deposition
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Methane steam reforming for hydrogen production using low water-ratios without carbon formation over ceria coated Ni catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 345, Issue 2, 1 August 2008, Pages 119–127
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