The deposition of coke during carbon dioxide reforming of methane over intermetallides

Dry reforming of methane was studied over the systems on the base of Ni3Al and Ni3Al + 5%Mo in the temperature range 600–900 °C. The materials have been prepared by self-propagating high temperature synthesis and characterized by XRD (in situ and ex situ), DTA–TG, SEM + EDX, HRTEM + EDS and XPS. The formation of Mo2C phase was observed at moderate Mo content (5–10 wt.%), which corresponds to a much improved catalytic activity and stability under the severe carbon dioxide reforming conditions. The structure and morphology of different types of carbon deposits obtained on Ni3Al and Ni3Al + 5%Mo catalysts were investigated. The results indicated that the addition a low amount of Mo to Ni3Al led to a decrease in carbon deposition. It is shown that Ni3Al + 5%Mo is promising catalyst for dry reforming of methane with carbon dioxide.