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Hydrogen production by methane tri-reforming process over Ni–ceria catalysts: Effect of La-doping

Paper ID Volume ID Publish Year Pages File Format Full-Text
46829 46450 2011 10 PDF Available
Title
Hydrogen production by methane tri-reforming process over Ni–ceria catalysts: Effect of La-doping
Abstract

The objective of the present work is the study of CH4 tri-reforming process (simultaneous carbon dioxide reforming, steam reforming and oxygen reforming) that can contribute to the CO2 abatement producing synthesis gas with the desiderate H2/CO ratio.A series of Ni–CeO2 catalysts with different La loadings is prepared by combustion synthesis and tested as catalysts in CH4 Tri-reforming reaction at 800 °C under atmospheric pressure with a GHSV of 30,000 h−1.It has been found that during tri-reforming reaction the activity of Ni–ceria catalysts can be enhanced by an appropriate amount of La doping (10 at.%), the CH4 and CO2 conversion increases from 93% and 83% to 96% and 86.5%, respectively. The activity enhancement appears to be related to synergic effect of nickel–lanthana–surface oxygen vacancies of ceria via interfacial active sites that contribute to increase the nickel dispersion and create a basic site distribution on the surface able to interact with CO2.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis gas production by CH4-tri-reforming with Ni–CeO2 catalysts doped with La (x = 0.05–0.50). ► Partial formation of solid solution with negative (x = 0) and positive expansion (0.05 < x < 0.50) of the ceria lattice emerges. ► Superior performance of Ni–La–CeO2 (x = 0.10) sample were related to a synergic effect of nickel–lanthana–surface oxygen vacancies, nickel dispersion and basic sites distribution on the surface.

Keywords
CO2 abatement; Tri-reforming of methane; Ni–CeO2, Ni–La–CeO2 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 104, Issues 1–2, 27 April 2011, Pages 64–73
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
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Any Questions? feel free to contact us