Spectroscopy of Flame Emission Temperature Measurement

Abstract

n this study laser induced fluorescence technique is applied to the Bunsen burner flame. The emission spectra of the Bunsen burner which consist visible and infrared bands coming from exited CH and H2O vapor molecules in butane /air flame, were recorded. The transition probability of the lines was calculated. The ratio of the emission intensity peaks was used for the estimation of the local temperature in different positions above the primary reaction zone. It was shown that the ratio of emission lines corresponding to _5;1 and _5;2 changes smoothly with temperature, which makes valid the empirically obtained relationship. This technique is used as a thermometer to determine different temperatures remotely. This is necessarily needed for measuring high temperatures in certain industries