Mole fraction change (IMAGE) Japan Science and Technology Agency Caption Mole fraction along the reaction time (s) calculated by the reactor simulation. The inlet gas consisted of CH4, O2, and He (as inert gas). The total pressure was set to P = 1 bar, and the partial pressure ratio of CH4, O2, and He was set to 2:1:4. The volumetric flow rate was set to 1 mL/s, and the reaction temperature was 700 °C. The catalyst weight was 1 g. Credit Atsushi Ishikawa Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.