Spent ion exchange resins produced by nuclear power plants are radioactive organic waste. Until now, there is no satisfactory industrial treatment. Supercritical water gasification (SCWG) of cationic ion exchange resin (CIER) used in nuclear power plants was carried out in a batch reactor in this study. Results showed that the gasification efficiency increased with the growth of temperature (550–750 °C), addition of alkali homogeneous catalyst (K₂CO₃), proper ratio loading of catalyst to CIER (1:1), decrease of feed concentration (2–10 wt%) and extension of residence time (10–60 min). Carbon gasification efficiency was up to 97.98% with K₂CO₃ added and 30 min at 750 °C in the batch reactor. The gaseous products mainly consist of H₂, CO, CO₂ and CH₄. The GC–MS analysis showed that the organic component in liquid products was mainly composed of benzene, monocycle arenes, phenol group and polycyclic aromatic hydrocarbons. Based on the experimental results, the formation and gasification pathways of CIER in SCW were proposed.

核电站生产的废离子交换树脂是放射性有机废物。到目前为止，还没有令人满意的工业处理方法。本研究在间歇式反应器中进行了核电厂使用的阳离子交换树脂 (CIER) 的超临界水气化 (SCWG)。结果表明，气化效率随着温度的升高（550-750 °C）、碱均相催化剂（K ₂ CO ₃）的加入、催化剂与CIER的适当负载比（1:1）、进料浓度的降低（ 2–10 wt%）和延长停留时间（10–60 分钟）。在间歇式反应器中加入K ₂ CO ₃并在 750 °C 下进行 30 分钟，碳气化效率高达 97.98% 。气态产物主要由 H₂、CO、CO ₂和CH ₄。GC-MS 分析表明，液体产品中的有机组分主要由苯、单环芳烃、酚基和多环芳烃组成。根据实验结果，提出了SCW中CIER的形成和气化途径。