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The effect of reduced oxygen species on the partial oxidation of methane to methanol was examined with nitrite melts. The experimental results support the suggestion that the formation of methanol or C 2  compounds depends on different reduced oxygen species, as observed in our previous work using nitrate melts. It has been suggested that the partial oxidation of methane proceeds to CH 3 OH or C 2  compounds via parallel pathways. This suggestion was verified by increasing the oxygen concentration to carry out the partial oxidation of methane in 25 mol% NaNCO 3  -75 mol% KNO 3  melts. A methanol selectivity of 8.2% and a methanol yield of 0.43% were observed with CH 4 /O 2  = 15/1 at 575 °C, whereas with CH 4 /O 2  = 7/1 methanol selectivity and yield increased to 23.7% and 1.1%, respectively. The results further confirm the contribution of the superoxide ion O 2  -  on methanol formation.

The Partial Oxidation of Methane to Methanol with Nitrite and Nitrate Melts