| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 205779 | Fuel | 2015 | 12 Pages |
•Nano particles of Co3O4 are highly dispersed over hydrogen calcined Ru–Co/γ-Al2O3 catalyst due to direct reduction.•The hydrogen calcined Ru–Co/γ-Al2O3 preferentially formed the metallic cobalt of HCP structure.•The activity for FTS is affected by the microstructure of cobalt and addition of ruthenium.
Ruthenium-promoted γ-Al2O3-supported cobalt catalysts were prepared by different slurry impregnation methods and calcined in a hydrogen/air atmosphere. The prepared catalysts were well characterized by N2 physisorption, TPR, XRD, TEM and XPS techniques. The addition of Ru caused the reduction peaks to shift towards lower temperatures due to the spillover of hydrogen from the Ru species. The ruthenium-promoted catalyst calcined under a hydrogen atmosphere leads to metallic cobalt with an HCP structure and shows good catalytic activity for Fischer Tropsch Synthesis under the reaction conditions studied. The catalyst calcined under an air atmosphere leads to metallic cobalt with FCC structures and showed lower catalytic activity. It was also found that the calcination atmosphere and structure of the catalyst have a profound effect on the activity and selectivity for FT synthesis.
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