电化学法解体石墨基体过程中的尾气分析

以盐类为电解质的电化学方法解体高温气冷堆模拟燃料元件基体石墨过程中,在阴、阳极两侧均会产生一些气相产物(尾气)。采用气相色谱法对电化学过程中产生的尾气进行了分析测试。结果表明:尾气中含有氢气、氧气、氮气、二氧化碳和氮氧化物;仅约1.5%的石墨基体氧化成二氧化碳。相对于直接燃烧石墨处理法,电化学方法能够大幅减少废气,尤其是二氧化碳的产生量,从而减小后续处理的技术难度。

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.