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Title: Characterizations and performances of Ni/diatomite catalysts for dry reforming of methane
Authors: Jabbout, Karam
Hassan, Nissrine El 
Davidson, Anne
Massiani, Pascale
Casale, Sandra
Affiliations: Department of Chemical Engineering 
Keywords: Synthesis gas
Dry reforming
Carbon deposition
Issue Date: 2015
Part of: Chemical engineering journal
Volume: 264
Start page: 351
End page: 358
Monometallic 5 wt% Ni containing catalysts were prepared by a two-solvent (cyclohexane/water) deposition method using cheap and widely available natural diatomites (Ni/AW2 and Ni/MN3) as supports. The fresh samples were characterized by SEM, EDX microanalysis, N2 adsorption–desorption isotherms, XRD and tested after reduction (in hydrogen) in dry reforming of methane. Spent catalysts were further characterized by TPH coupled with mass spectrometry. Although slightly less active than a reference Ni/Aerosil (Ni/SiO2) catalyst prepared in similar conditions, the Ni/diatomites catalysts showed good activity with 90% methane conversion reached on Ni/MN3 at 800 °C and a high selectivity towards dry reforming reaction (H2:CO molar ratio around unity over the entire temperature range). The catalysts were also relatively stable during catalytic measurements conducted at 650 °C for 12 h. In addition, depending on the nature of the diatomite and on the conditions of thermal activation, carbon deposits with lower toxicity (easier to remove by reactivation) than those formed on the Ni/Aerosil were obtained.
DOI: 10.1016/j.cej.2014.11.109
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemical Engineering

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