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Title: CO2 reforming of methane over Ni-Co/ZSM5 catalysts. Aging and carbon deposition study
Authors: Estephane, Jane 
Aouad, Samer 
Hany, Sara
Khoury, Bilal El 
Gennequin, Cédric
Zakhem, Henri El 
El Nakat, J
Aboukaïs, Antoine
Abi Aad, Edmond
Affiliations: Department of Chemical Engineering 
Department of Chemistry 
Department of Chemistry 
Department of Chemical Engineering 
Keywords: Catalyst deactivation
Dry reforming
Carbon deposition
Subjects: Zeolites
Issue Date: 2015
Part of: International journal of hydrogen energy
Volume: 40
Issue: 30
Start page: 9201
End page: 9208
The wet impregnation method was used to prepare ZSM5 supported nickel and/or cobalt monometallic and bimetallic catalysts with a 7 wt.% total metal loading. The CO2 reforming of methane reaction was carried out in the 600 °C–800 °C temperature range over the different catalysts (GHSV 60000 mL g−1 hr−1). The cobalt containing catalysts favored the reverse water gas shift reaction at high temperature and cobalt acted as a synergist to nickel, as overall, bimetallic catalysts showed better catalytic performance. Carbon deposition was less expressed over catalysts with high cobalt content. Following 12 h on stream at 700 °C, the bimetallic catalyst with cobalt to nickel ratio of 2, showed high CO2 and CH4 conversions (∼60%) accompanied with the lowest carbon deposition (5%). The thermal analysis of aged catalysts showed that among the deposited carbon species, it is the carbon present in the proximity of nickel and/or cobalt catalytic sites that is responsible of deactivation.
DOI: 10.1016/j.ijhydene.2015.05.147
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemical Engineering

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