| CuO-Ru/Al2O3 催化臭氧化降解苯乙酮的研究 |
| 摘要点击 2488 全文点击 1662 投稿时间：2009-04-10 修订日期：2009-07-20 |
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| 中文关键词 CuO-Ru/Al2O3催化剂 苯乙酮 COD 吸附 ·OH |
| 英文关键词 CuO-Ru/Al2O3 catalyst acetophenone（AP） COD adsorption hydroxyl radical (·OH) |
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| 中文摘要 |
| 采用浸渍法制备了以活性Al2O3为载体的双组分催化剂CuO-Ru/Al2O3，利用该催化剂催化臭氧化降解了苯乙酮.结果表明，贵金属钌掺杂能显著提高CuO/Al2O3催化臭氧化苯乙酮的降解效率，如在相同条件下处理30 min后,单独臭氧氧化、CuO/Al2O3/O3和CuO-Ru/Al2O3/O3对苯乙酮水溶液的COD去除率分别为6.3%、20.0%和54.0%.pH对CuO-Ru/Al2O3催化臭氧化降解苯乙酮的效率并没有影响,但与单独臭氧化相比，该催化臭氧化体系更适合在中性或酸性条件下应用.CuO-Ru/Al2O3对水中臭氧有较好的催化分解活性，臭氧分解的速率常数达2.58×10-3s-1，高于二次水中臭氧的分解速率常数1.19×10-3s-1.叔丁醇的试验结果表明，CuO-Ru/Al2O3/O3降解苯乙酮反应遵循羟基自由基(·OH)反应机制. |
| 英文摘要 |
| Two-component CuO-Ru based on active Al2O3(CuO-Ru/Al2O3) catalyst was prepared by incipient wetness impregnation and used to catalytic ozonation of acetophenone(AP). The results showed that doping Ru could significantly improve the catalytic activity of CuO/Al2O3. For example,the COD removal rates of AP solution after 30min by ozonation alone,CuO/Al2O3/O3,and CuO-Ru/Al2O3/O3 were 6.3%,20.0% and 54.0%,respectively. The change of pH almost had no affect on degradation efficiency of AP. However,a comparison of COD removal between ozonation alone and catalytic ozonation indicated that CuO-Ru/Al2O3 catalyst was more suitable for application in neutral or acidic condition. CuO-Ru/Al2O3 catalyst could accelerate decomposition rate of ozone in water,and its decomposition rate constant reached 2.58×10-3s-1 while that of ozone alone in double-water was 1.19×10-3s-1.The experimental result of t-butanol indicated that CuO-Ru/Al2O3 catalytic ozonation of AP followed a radical-type mechanism. |
