Partial oxidation of CH4 over ZSM-5 catalysts

The oxidation of CH4 with O2 at low pressure was carried out over ZSM-5 catalysts. The H-ZSM-5 catalyst (View the MathML source) exhibited higher activities than other commercial silicas. The rate depends on the O2 concentration. The selectivities to CH3OH are higher over Na-ZSM-5 while those to HCHO are higher over H- and Cs-ZSM-5 catalysts. The role of Si-rich ZSM-5 in the partial oxidation of CH4 was discussed.