Sintering and carbidization under simulated high conversion on a cobalt-based Fischer-Tropsch catalyst; manganese oxide as a structural promotor

The commercial application of cobalt-based Fischer-Tropsch synthesis (FTS) suffers from catalyst deactivation. One the main deactivation mechanisms under industrial conditions is sintering. In this work, we explored role manganese oxide as a structural promoter against sintering in carbon nanofiber supported cobalt model catalyst. We employed situ Mössbauer emission spectroscopy to study gas function steam partial pressure, which mimics high CO conversion during FTS. Steam accelerates non-promoted metallic particles. Model experiments point synergistic effect between monoxide and on mangense-promoted case, significantly reduced, indicative stabilization small particles by oxide. Nevertheless, fraction close interaction with carburized these conditions, resulting lower catalytic activity.