| CoCuMnOx光催化氧化多组分VOCs特性及其动力学 |
| 摘要点击 1875 全文点击 971 投稿时间：2015-11-10 修订日期：2015-12-14 |
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| 中文关键词 CoCuMnOx 光催化氧化 VOCs 反应动力学 表征 |
| 英文关键词 CoCuMnOx photocatalytic oxidation VOCs reaction kinetics characterization |
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| 中文摘要 |
| 实验采用共沉淀法制备太阳能吸收涂料CoCuMnOx,探究可见光下甲苯、乙酸乙酯和丙酮混合3组分VOCs的光催化氧化性能,并从动力学角度分析各自的反应速率变化.结果表明,单组分VOCs初始浓度400 mg·m-3、光照距离120 mm,350 cm2镜面载体负载1 g CoCuMnOx下用100 W卤钨灯照射6 h后,甲苯转化率为57%、乙酸乙酯为62%、丙酮为58%; 由于3组分VOCs之间相互竞争,甲苯、乙酸乙酯和丙酮的转化率较单组分下降了5%~26%.单组分与3组分VOCs的光催化均符合假一级反应动力学,单组分甲苯、乙酸乙酯和丙酮的反应速率分别为0.002、0.0028和0.00233 min-1; 混合3组分中其反应速率为单组分的0.49~0.88倍. |
| 英文摘要 |
| Solar energy absorption coating CoCuMnOx was prepared by co-precipitation method and applied to photodegrade multi-component VOCs including toluene, ethyl acetate and acetone under visible light irradiation. The photocatalytic oxidation performance of toluene, ethyl acetate and acetone was analyzed and reaction kinetics of VOCs were investigated synchronously. The research indicated that removal rates of single-component toluene, ethyl acetate and acetone were 57%, 62% and 58% respectively under conditions of 400 mg·m-3 initial concentration, 120 mm illumination distance, 1 g/350 cm2 dosage of CoCuMnOx and 6 h of irradiation time by 100 W tungsten halogen lamp. Due to the competition among different VOCs, removal efficiencies in three-component mixture were reduced by 5%-26% as compared with single VOC. Degradation processes of single-component VOC and three-component VOCs both fitted pseudo first order reaction kinetics, and kinetic constants of toluene, ethyl acetate and acetone were 0.002, 0.0028 and 0.00233 min-1 respectively under single-component condition. Reaction rates of VOCs in three-component mixture were 0.49-0.88 times of single components. |
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