470111 Bi-Reforming of Methane at Low Temperatures over Pt or Pd (Ni-Mg/ceria-zirconia) Catalysts

Thursday, November 17, 2016: 9:06 AM
Franciscan C (Hilton San Francisco Union Square)
Nada Elsayed, Babu Joseph and John Kuhn, Chemical & Biomedical Engineering, University of South Florida, Tampa, FL

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 TOF’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.

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See more of this Session: Catalysis for C1 Chemistry IV: CH4 Conversion II
See more of this Group/Topical: Catalysis and Reaction Engineering Division