The partial oxidation of methane to synthesis gas has been studied in
an isothermal continuous flow reactor operated with the phases in plug
flow, using a silica-supported palladium catalyst. The reaction mecha
nism involves the sequential combustion and reforming of methane. The
catalyst bed is not uniform in terms of the composition of the palladi
um phase. The implications for investigations using a pulse apparatus
are discussed. Finally, large palladium crystallites readily grow carb
on filaments.