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Carbon dioxide reforming of methane over ordered mesoporous NiO–MgO–Al2O3 composite oxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
46781 46448 2011 14 PDF Available
Title
Carbon dioxide reforming of methane over ordered mesoporous NiO–MgO–Al2O3 composite oxides
Abstract

Ordered mesoporous NiO–MgO–Al2O3 composite oxides with various Ni and Mg content were facilely synthesized via one pot evaporation induced self-assembly (EISA) strategy. These mesoporous materials with large specific surface areas, big pore volumes, uniform pore sizes and superior thermal stability were investigated as the catalysts for the carbon dioxide reforming of methane reaction. These materials performed high catalytic activity as well as long stability. The improved catalytic performances were suggested to be closely associated with both the amount of “accessible” active centers for the reactants owing to their advantageous structural properties and the stabilized Ni nanoparticles by mesoporous framework matrix due to the “confinement effect” of the mesopores. Besides, the role of the MgO basic modifier was also studied. It was observed that only moderate amount of the Mg containing (2 M%) could greatly promote the catalytic performances. The stabilized Ni nanoparticles as well as doped MgO had reinforced capacity of resistance to coke, accounting for no deactivation after 100 h long-term stability test at 700 °C. Therefore, the ordered mesoporous NiO–MgO–Al2O3 composite oxides promised a series of novel and stable catalyst candidates for carbon dioxide reforming of methane reaction.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ordered mesoporous NiO-MgO-Al2O3 composite oxides with various Ni and Mg content were facilely synthesized via one-pot evaporation induced self-assembly strategy. ► These materials were employed as the catalysts for dry reforming and behaved excellent catalytic activities and long stability. ► Outstanding textural properties of the mesoporous materials and the “confinement effect” of the mesostructure contributed to distinguished catalytic performances. ► The role of the MgO basic modifier was detailedly investigated. ► Characteristics of the coke over the mesoporous catalyst were carefully studied.

Keywords
Ordered mesopore; NiO–MgO–Al2O3; Carbon dioxide reforming; Methane
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Carbon dioxide reforming of methane over ordered mesoporous NiO–MgO–Al2O3 composite oxides
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 108–109, 11 October 2011, Pages 177–190
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