CO2 reforming of methane over Ni-Co/ZSM5 catalysts. Aging and carbon deposition study

J. Estephane, S. Aouad, S. Hany, B. El Khoury, C. Gennequin, H. El Zakhem, J. El Nakat, A. Aboukaïs, E. Abi Aad

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)9201-9208
Number of pages8
JournalInternational Journal of Hydrogen Energy
Issue number30
StatePublished - Aug 10 2015


  • Carbon deposition
  • Catalyst deactivation
  • Cobalt
  • Dry reforming
  • Nickel
  • Zeolites

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


Dive into the research topics of 'CO2 reforming of methane over Ni-Co/ZSM5 catalysts. Aging and carbon deposition study'. Together they form a unique fingerprint.

Cite this