Production of Synthesis Gas via Dry Reforming of Methane over Co‐Based Catalysts: Effect on H₂/CO Ratio and Carbon Deposition

The effect of support type on synthesis gas production using Co‐based catalysts supported over TiO 2 ‐P25, Al 2 O 3 , SiO 2 , and CeO 2 was investigated. The catalysts were prepared by the incipient wet impregnation method and characterized by various techniques for comparison. Experiments were performed in a micro tubular reactor. The results revealed that all Co‐supported catalysts produced synthesis gas ratios of 1 and below and, thus, proved to be well‐suited for methanol and Fischer‐Tropsch syntheses. Co catalysts supported over TiO 2 ‐P25 and Al 2 O 3 provided better synthesis gas ratios and stability performances. The promotion of a Co/TiO 2 ‐P25 catalyst with Ce had a substantial influence on its catalytic activity and the amount of carbon deposit. A Ce‐promoted catalyst diminished markedly the extent of carbon deposition and thus boosted the performance towards better activity and stability.