Abstract:

For the treatment of liquid propellant wastewater(hydrazine nitrate and hydrazine anhydrous), the catalytic supercritical water oxidation technology was used to study the effects of temperature, pressure, peroxidation coefficient, reaction time and catalyst on the degradation of ammonia nitrogen and COD. The results showed that temperature and pressure had significant effects on COD degradation, and the peroxidation coefficient and temperature were important factors affecting NH₃-N. The catalysts Al₂O₃, MnO₂ and CeO₂ all achieved a degradation rate of COD of more than 99.6%. Among of them, CeO₂ had the best catalytic effect on the degradation of NH₃-N. Compared with non-catalytic, the degradation effect was increased by 74%, which met the aerospace propellant wastewater discharge standard, and the CeO₂ property was stable, and no new product formed after the reaction.

Key words: supercritical water oxidation, hydrazine nitrate, hydrazine anhydrous, catalyst

摘要：

采用催化超临界水氧化技术处理液体推进剂废水（硝酸肼和无水肼），研究温度、压力、过氧系数、反应时间以及催化剂种类对NH₃-N和COD降解效果的影响。结果表明：温度和压力对COD的降解效果影响显著，过氧系数和温度是影响NH₃-N的重要因素。催化剂Al₂O₃、MnO₂和CeO₂使COD的降解率均达到99.6%以上。在NH₃-N的降解中，CeO₂催化效果最佳，与非催化相比降解效果提升了74%，达到了航天推进剂污水排放标准，而且CeO₂性质稳定，反应后不会生成新产物。

关键词: 超临界水氧化, 硝酸肼, 无水肼, 催化剂

CLC Number: 

• X703.1