Selective CO2 Detection with a Lithium Conductor Based Sensor

Abstract
Selective CO2 sensing was examined with CO2 sensor based on a lithium ionic conductor, LiTi2(PO4)3 + 0.2Li3PO4. The CO2 detectability was little influenced with NO2 coexistence in the atmosphere. The sensor could also detect the CO2 concentration selectively in the atmosphere where the SO2 content was smaller than approximately 20 ppm. In the case of CH4 coexistence, the total sum of the primary CO2 and CO2 formed from the CH4 oxidation, was obtained with the sensor.