| 双组分VOCs的催化氧化及动力学分析 |
| 摘要点击 2003 全文点击 1182 投稿时间：2014-01-24 修订日期：2014-03-27 |
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| 中文关键词 甲苯 氯苯 微波 管式炉 催化氧化 反应动力学 |
| 英文关键词 toluene chlorobenzene microwave tube furnace catalytic oxidation reaction kinetics |
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| 中文摘要 |
| 考察了微波加热与管式炉加热下挥发性有机化合物（VOCs）甲苯与氯苯的催化氧化性能，并对双组分VOCs的反应动力学进行了分析. 结果表明，VOCs的竞争吸附使得双组分中甲苯和氯苯的转化率比单组分降低3%~12%；微波的“热点效应”与“非热效应”使得VOCs转化效率明显优于管式炉加热，尤其是氯苯的转化率提高了31%~38%；微波加热降低了氧化反应温度和处理能耗. 动力学分析表明，微波加热下甲苯和氯苯的反应活化能比管式炉加热下减少了2146 J ·mol-1和1450J ·mol-1，微波加热下氯苯的化学反应速率常数是管式炉加热的35倍，甲苯的反应速率常数提高了6倍. |
| 英文摘要 |
| Catalytic oxidations of two-component volatile organic compounds (VOCs) toluene and chlorobenzene were investigated under microwave heating and tube furnace heating, respectively, and reaction kinetics were analyzed in this paper. The research indicated that competitive adsorption between toluene and chlorobenzene reduced their removal efficiencies by 3%-12% as compared to single component. ‘Hot spot effect' and ‘non-thermal effect' under microwave irradiation obviously enhanced conversion efficiencies of VOCs, especially, the chlorobenzene removal was increased by 31%-38%. Moreover, reaction temperature and energy consumption were both reduced under microwave heating. The dynamic calculations showed that microwave heating decreased the activation energies by 2146 J ·mol-1 and 1450 J ·mol-1 for toluene and chlorobenzene, respectively, as compared with tube furnace heating. Meanwhile, microwave heating enhanced the reaction rate constants of chlorobenzene and toluene to about 35 times and 6 times of that of tube furnace heating. |
