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Hydrogen production over partial oxidation of methane using NiMgAl spinel catalysts: A kinetic approach

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Hydrogen production over partial oxidation of methane using NiMgAl

spinel catalysts: A kinetic approach

Authors

Hassiba Messaoudi, Sébastien Thomas, Abdelhamid Djaidja, Samira Slyemi, Redouane Chebout, Siham Barama, Akila Barama, Fouad Benaliouche

Publication date

2017/7/1

Journal

Comptes Rendus Chimie

Volume 20 Issue 7 Pages 738-746 Publisher Elsevier Masson Description

NiMgAl–based catalysts were synthesized by coprecipitation, sol–gel, and impregnation methods, calcined at 700 °C for 4 h and tested in partial oxidation of methane in a temperature range of 500– 800 °C. The fresh and used unsupported and supported samples were characterized by X-ray diffraction, nitrogen physisorption with Brunauer-Emett-Teller (BET) analysis, and H2

–temperature-programmed reduction. X-ray diffraction analysis showed, for all samples, the formation of spinel phases MgAl2O4 and/or NiAl2O4 with crystallite sizes of 6–14 nm. H2–temperature-programmed

reduction analysis showed reduction of two Ni2+ species (in octahedral and tetrahedral sites of a spinel

structure) into metallic nickel known to be responsible for the methane activation. The 10 wt % Ni/MgAl2O4 impregnated catalysts exhibited the highest activity and stability in the partial oxidation of

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