Bi-Reforming of Methane at Low Temperatures over Pt or Pd (Ni-Mg/ceria-zirconia) Catalysts

Bi-reforming (combined steam and CO₂ reforming) of methane was studied over platinum (0.5, 2 wt. %) or palladium (0.5, 2 wt. %) and/or nickel (8 wt. %) and magnesium (8 wt. %) immobilized onto a ceria-zirconia support. XRD patterns demonstrated that the support was a cubic fluorite structure and Ni and Mg were immobilized onto it. Temperature-programmed reduction showed that addition of Pt or Pd substantially decreased the reduction temperature. CO₂ desorption studies indicated that the metals had an impact on the basicity of the catalysts.  Bi-reforming studies also showed that addition of Pt or Pd improved the H₂:CO ratio.