METHOD FOR DETERMINING CONTENT OF COMPONENTS IN HIGH-TEMPERATURE GASEOUS MEDIA Russian patent published in 2024 - IPC G01N27/407 

FIELD: measurement.

SUBSTANCE: invention relates to gas analysis, particularly to determination of content of components in high-temperature gaseous media and can be used to measure content of oxygen and carbon dioxide in a gas mixture with nitrogen when solving technological tasks related to personnel safety and environmental control. Method consists in the fact that a sensor with a cavity formed by two tightly connected disks from an oxygen-conducting solid electrolyte is placed in the flow of the analysed gas mixture, on opposite surfaces of one of discs there are electrodes, and between the discs there is a capillary, at that, to measure the oxygen concentration, DC voltage is applied to the electrodes in range of 0.2÷0.6 V with supply of negative pole to internal electrode, whereby free oxygen in analysed gas mixture is pumped out, and in the process of achieving a steady state, when the amount of the analysed gas mixture supplied through the capillary into the sensor cavity becomes equal to the amount of oxygen pumped from it, limiting current flowing through sensor is measured, by value of which concentration of oxygen in analysed gas mixture is determined, then, to measure concentration of carbon dioxide, DC voltage is increased to 0.8÷1.2 V, whereby oxygen formed as a result of electrolytic decomposition of carbon dioxide is pumped out, and in the process of achieving a steady state, when the amount of the analysed gas mixture supplied through the capillary into the sensor cavity becomes equal to the amount of oxygen pumped from it, limiting current flowing through the sensor is measured, the value of which is used to determine concentration of carbon dioxide in the analysed gas mixture.

EFFECT: wider range of technical means for determining components in high-temperature gaseous media using solid oxide sensors.

1 cl, 4 dwg