Carbon monoxide is a primary intermediate in supercritical water oxidation (SCWO) processes. A validated chemical kinetic model for hydrogen oxidation in supercritical H₂O/CO₂ mixtures was expanded to describe carbon monoxide oxidation and water gas shift reaction in supercritical water (SCW). The model performance was evaluated against experimental data in literature. Data for carbon monoxide oxidation were well reproduced by the model. Underprediction of hydrogen formation was attributed mostly to hydrolysis reactions occurring on the reactor surface. The rate of water gas shift reaction observed experimentally under SCW conditions strongly exceeds that predicted by the model. Analysis indicates that the observed WGS reaction is largely due to catalytic effects on the reactor surface, even though trace impurities of oxygen present in the experiments may also enhance reaction. Pressure corrections on thermodynamic properties and inclusion of HOCHO subset were found to have negligible influence on modeling results. CO+OH=CO₂+H, HO₂+H₂O=OH+H₂O₂ and OH+HO₂=O₂+H₂O were identified as the most important elementary reactions by sensitivity analysis.

一氧化碳是超临界水氧化（SCWO）工艺中的主要中间体。经过验证的超临界H ₂ O / CO _2中氢氧化的化学动力学模型扩展混合物以描述超临界水（SCW）中的一氧化碳氧化和水煤气变换反应。针对文献中的实验数据评估了模型性能。该模型很好地再现了一氧化碳氧化的数据。氢形成的预测不足主要归因于反应器表面发生的水解反应。在SCW条件下实验观察到的水煤气变换反应速率大大超过了模型预测的速率。分析表明，观察到的WGS反应很大程度上是由于对反应器表面的催化作用，尽管实验中存在的微量氧杂质也可能会增强反应。发现对热力学性质的压力校正和HOCHO子集的包含对建模结果的影响可忽略不计。通过敏感性分析，将₂ + H，HO ₂ + H ₂ O = OH + H ₂ O ₂和OH + HO ₂ = O ₂ + H ₂ O确定为最重要的元素反应。