Mechanism and kinetics of methane dry reforming at elevated pressures and temperatures were investigated on Ni hexaaluminates and benchmarked to Pt catalysts. The higher rate of coke deposition in presence of Ni via carbon-nano-tubes is attributed to the retarded re-oxygenation of surface carbon on Ni compared to Pt. The rates correlate directly to the activation of methane and the coverage of the active sites in carbon dioxide derived species. The derived model enables a comparison to industrial relevant conditions by extending the validity of the available data to more severe upscaling conditions.
«