Partial oxidation of methane over Ni catalysts based on hexaaliminate- or perovskite-type oxides Original Research Article

Ni/Al2O3, hexaaluminate-type BaNixAl12−xO19−α and perovskite-type LaAl5/6Ni1/6O3 were investigated for partial oxidation of methane (POM). The hexaaluminate-type BaNiAl11O19−α calcined at 1400 °C demonstrated more stable and higher activity than Ni/Al2O3 calcined at 1000 °C. The BaNiAl11O19−α catalyst reduced at 1000 °C was more active than the catalyst reduced at 800 °C. The results from XPS analysis revealed that the hexaaluminate-type catalysts calcined and reduced at higher temperature had Ni-rich surfaces and highly dispersed Ni species derived from hexaaluminate crystal, resulting in high activity for partial oxidation of methane.