ABOUT THE POSSIBILITY OF USING THERMOCHEMICAL GAS ANALYZERS IN A MULTICOMPONENT MIXTURE

Abstract

Kinetic parameters finding’s method of heterogeneous catalytic oxidation reactions of  combustible gas’s small impurities in air on a thin  platinum wire was described. It consists in obtaining from the wire’s current-voltage characteristic the dependence of the critical  current values on its mass fraction in air. They corresponding to the catalytic ignition and extintion  of the gas impurity. A method of determining the content of two  combustible gases in the air, what based on processing the platinum wire’s current-voltage characteristic, was proposed. Depending on the level of the total gases concentration in the air, the  determining experimental characteristics are not  only the wire (catalyst) overheating relative to the  inert wire under the conditions of catalytic ignition,  but also the wire overheating during catalytic  extinguishing or under conditions of self-sustaining  catalytic combustion (without electric current  heating).