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Stable low-temperature dry reforming of methane over mesoporous La2O3-ZrO2 supported Ni catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
46677 46445 2012 12 PDF Available
Title
Stable low-temperature dry reforming of methane over mesoporous La2O3-ZrO2 supported Ni catalyst
Abstract

A series of supported Ni catalysts was prepared using various supports and tested in low-temperature (400 °C) dry reforming of methane. Ni/La2O3-ZrO2 showed near-to equilibrium yields of CO and H2 and the highest stability. This catalyst was studied in greater detail in order to determine the influence of the support morphology on the catalyst activity and stability. To this end, nonstructured, mesoporous, and macroporous La2O3-ZrO2 were prepared and characterized before and after loading with Ni. Among them, only Ni on the mesoporous support showed practically no change in activity over 180 h on-stream, whereas the others deactivated. Formation of graphene-like coke layers on the catalysts and of NiO shell over Ni particles appears to be responsible for catalyst deactivation, while sintering of Ni did not play a major role. The enhanced stability of Ni on the mesoporous La2O3-ZrO2 is attributed to stronger interaction of the Ni particles with the support stemming from a pore confinement effect.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Supported Ni catalysts for dry reforming of methane at 400 °C have been developed. ► Ni supported on mesoporous ZrO2-La2O3 is active and stable for 180 h. ► Ni supported on non-structured and macroporous ZrO2-La2O3 deactivates. ► Major deactivation mechanism is covering Ni particles by graphene and surface oxidation of Ni. ► Ni sintering does not appear to play a significant role in deactivation.

Keywords
Carbon dioxide; Methane; Synthesis gas; Dry reforming; Coke formation; Mesoporous; Macroporous
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Stable low-temperature dry reforming of methane over mesoporous La2O3-ZrO2 supported Ni catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 113–114, 22 February 2012, Pages 19–30
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