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Study of Ni–M/MgO and Ni–M–Mg/Al (M= Fe or Cu) catalysts in the CH4–CO2 and CH4–H2O reforming

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Study of Ni–M/MgO and Ni–M–Mg/Al (M= Fe or Cu) catalysts in the

CH4–CO2 and CH4–H2O reforming

Authors

A Djaidja, H Messaoudi, D Kaddeche, A Barama

Publication date

2015/4/20

Journal

International Journal of Hydrogen Energy

Volume 40 Issue 14 Pages 4989-4995 Publisher Pergamon Description

The catalysts Ni–M/MgO prepared by impregnation of the MgO support and (Ni–M–Mg)2Al by

co-precipitation method using NH4OH as precipitating agent (M=Cu or Fe), were characterized by BET

surface area, X-ray diffraction (XRD), temperature programmed reduction (TPR), temperature programmed oxidation (TPO), Transmission electronic microscopy (TEM) and tested in CH4/CO2 and

CH4/H2O reactions. XRD analysis showed the presence of NixMg1 − xO (x = 0.05 or 0.1), NiAl2O4 and/or

MgAl2O4 solid solutions. NiO was not observed on all catalysts what could confirm the formation of

solid solutions. The reducibility of the catalysts increased in the presence of Cu or Fe due to the reduction assistance of these elements. The reactivity results showed very high performances (with CH4 conversion and yields of H2 and CO up to 90%) and a good resistance for coke formation. For the

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