| 摘要: |
| 在压力24～30 MPa和温度400～500 ℃条件下，以Cu2+为催化剂、H2O2为氧化剂，在连续流管式反应器中进行了催化超临界水氧化偏二甲肼试验,研究温度、压力、停留时间和Cu2+质量浓度对偏二甲肼氧化降解的影响。结果表明，在超临界水中偏二甲肼能被有效去除。偏二甲肼的去除率随反应温度和压力的升高、停留时间的延长和Cu2+质量浓度的增大而提高。当压力为30 MPa、温度为450 ℃、停留时间为3.9 s、Cu2+质量浓度为15 mg/L时，COD去除率可达97.8 %。 |
| 关键词: 超临界水氧化 偏二甲肼 Cu2+ 催化剂 |
| DOI： |
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| 基金项目:陕西省教育厅基金项目(04JK307)；陕西理工学院基金项目(SLG0321) |
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| Study on the oxidation of unsymmetrical dimethy-hydrazine in supercritical water |
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| Abstract: |
| The catalytic oxidation of unsymmetrical dimethy-hydrazine in supercritical water was investigated over a catalyst Cu2+ and oxidant H2O2 in a tubular continuous flow reactor at 24-30 MPa,400-500 ℃.The effects of temperature,pressure,residence time and mass concentration of oxidant Cu2+ on the destruction of unsymmetrical dimethy-hydrazine were also studied.Results indicated that unsymmetrical dimethy-hydrazine could be decomposed effectively by catalytic supercritical water oxidation.The elimination efficiency of unsymmetrical dimethy-hydrazine was significantly improved as reaction temperature,pressure,residence time and and mass concentration of oxidant Cu2+ increased.The 97.8% COD removal was achieved at 30 MPa,450 ℃ and 15 mg/L Cu2+ in 3.9 s. |
| Key words: supercritical water oxidation unsymmetrical dimethy-hydrazine Cu2+ catalysts |
