Analysis of Off Gas From Disintegration Process of Graphite Matrix by Electrochemical Method

Using electrochemical method with salt solutions as electrolyte, some gaseous substances (off gas) would be generated during the disintegration of graphite from high-temperature gas-cooled reactor fuel elements. The off gas is determined to be composed of H₂, O₂, N₂, CO₂ and NO_x by gas chromatography. Only about 1.5% graphite matrix is oxidized to CO₂. Compared to the direct burning graphite method, less off gas, especially CO₂, is generated in the disintegration process of graphite by electrochemical method and the treatment of off gas becomes much easier.