(626c) Bi-Reforming of Methane at Low Temperatures over Pt or Pd (Ni-Mg/ceria-zirconia) Catalysts

Bi-reforming of methane was studied over platinum (0.16 wt. %) or palladium (0.13wt. %) and/or nickel (1.4 wt. %) and magnesium (1.0 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 with Pd doped catalysts having lower reduction temperatures than Pt doped catalysts. CO₂ desorption studies indicated that the metals had an impact on the basicity of the catalysts with Pd catalysts having more basic sites as more carbon dioxide was adsorbed. Bi-reforming studies showed that addition of Pt or Pd improved the H₂:CO ratio compared to dry reforming alone. In addition both Pd and Pt catalysts had comparable reaction results (dry reforming), however Pt catalysts had marginally higher TOFâ??s (2.69-4.74 s^-1) compared to Pd catalysts (2.40-4.58 s^-1). Ongoing studies have shown that the addition of steam has improved the H2:CO ratio at low temperatures.