(634e) Ptmgfe/Ni-Based Al2O3-CeO2 Catalysts for Dry-Reforming of Methane

The dry reforming of methane (DRM) converts two major greenhouse gases into a synthesis gas with H₂:CO ratio of close to 1 and, thus, can be used readily for Fischer-Tropsch and carbonylation reactions.[1][2] In recent years, CO₂ reforming of methane (dry reforming of methane, DRM) has become an attractive research area because it converts two major greenhouse gasses into syngas (CO and H₂), which can be directly used as fuel or feedstock for the chemical industry.[3] The promotional effect of Fe, Mg, Mo, and Pt on Ni-based catalyst supported on Al₂O₃-CeO₂ (Ni/A_l2O₃-CeO₂) have been investigated in dry reforming of methane (DRM) reaction. To elucidate the influence of metal promoters on the Ni/Al₂O₃-CeO₂ materials, the catalytic reaction was conducted in a continuous fixed-bed flow reactor at various reaction temperatures (550-700 °C), space velocity of 12,000 ml𝑔𝑐𝑎𝑡^−1 h^-1 and different feedstokcs (pure CH₄ or 50% CH₄ and CO₂ mixture) under atmospheric pressure for 10 h time on stream. The combination of material characterization and catalytic test reveals that Fe, Mg, and Mo-doped Ni/Al₂O₃-CeO₂ are excellent catalyst for this process helping to achieve high degrees of CO₂ conversions. The co-doped Ni/Al₂O₃-CeO₂ catalysts with Mg and Fe significantly enhanced the activity, selectivity and stability of the obtained Mg-Fe/Ni/Al₂O₃-CeO₂ composite catalyst. Further, addition of 0.05wt% Pt to the Mg-Fe/Ni/Al₂O₃-CeO₂ composite catalyst leads to an excellent catalytic activity/stability at 700 oC during the dry reforming reaction

References

[1] H. Wu et al., “Bi- and trimetallic Ni catalysts over Al2O3and Al2O3-MOx(M=Ce or Mg) oxides for methane dry reforming: Au and Pt additive effects,” Appl. Catal. B Environ., vol. 156–157, pp. 350–361, 2014.

[2] M. Ocsachoque, F. Pompeo, and G. Gonzalez, “Rh-Ni/CeO2-Al2O3 catalysts for methane dry reforming,” Catal. Today, vol. 172, no. 1, pp. 226–231, 2011.

[3] Z. BIAN, S. Das, M. H. Wai, P. Hongmanorom, and S. Kawi, “A review on bimetallic Ni-Based catalysts for CO2 reforming of methane,” ChemPhysChem, vol. 18, pp. 3117–3134, 2017.