PLATINUM CATALYTIC EFFECT ON OXYGEN FUGACITY OF CO2-H-2 GAS MIXTURES MEASURED WITH ZRO2 OXYGEN SENSOR AT 10(5) PA FROM 1300 TO 700-DEGREES-C

摘要

The oxygen fugacity of CO2-H-2 gas mixtures were measured with a ZrO2 oxygen sensor at high temperatures in a furnace. We confirmed that the oxygen fugacity values measured by the ZrO2 cell are more reducing than those of the CO2-H-2 gas mixtures calculated by using JANAF data at temperatures below 1150 degrees C as was previously reported by Huebner (1975). We successfully decreased the deviation of the measured oxygen-fugacity value from the calculated one down to temperature of 800 degrees C by using a Pt catalyst. Our results suggest that the deviation is probably due to incomplete equilibration of the gases. [References: 9]