The purpose of the study is devoted to real-time detection of metallic pollutants present in industrials stack gas. This method is based on spectro-analysis (Atomic Emission Spectroscopy) using an inductively coupled plasma torch without external calibration, this calibration still being the main problem of the system.
The mass fluxes of a considered pollutant are then determined by using the intensity ratios of the metallic element spectral lines with those of the plasma gas element. The fluidised bed technologies is used to inject directly the metallic particles into the plasma.
Copper spectrum in an argon plasma centered on 515 nm
The laboratory ICP torch gives the opportunity to work either with argon or dry air plasma at a frequency of 64 MHz, delivering a power up to 2.5 kW.
Mass flux evolution of copper with successives acquisitions
The mixtures represent different proportions of a metallic pollutant (CuO) initially placed into a fluidised bed composed mainly of silica sand.