Abstract
Ru-promoted Ni–Co catalysts supported on MgO–Al2O3 are tested for dry reforming activity in a fixed-bed reactor at atmospheric pressure. The effect of temperature and contact time is investigated, and the catalysts maintain high stability for up to 47 h on stream. The support surface area significantly affects dispersion, and whisker carbon is observed in spent samples with pore sizes higher than 15 nm. H2-TPR studies reveal the presence of spinels that are not completely reducible, yet the catalysts give remarkable activity. Four synthesis methods are tested for the support, with the sol-gel method in neutral conditions providing the best performance, with a small compromise on activity but a significant improvement in catalyst stability and no whisker carbon formation. Further work will optimize the Ni/Co ratio in the active phase to decrease the carbon buildup on the catalysts.
Original language | English |
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Pages (from-to) | 17153-17163 |
Number of pages | 11 |
Journal | International Journal of Hydrogen Energy |
Volume | 45 |
Issue number | 35 |
DOIs | |
Publication status | Published - 10 Jul 2020 |
Keywords
- Cobalt
- Methane dry reforming
- Nickel
- Ruthenium
- Whisker carbon