臭氧增强氧化铁催化剂上氯苯的催化氧化。
Ozone-enhanced catalytic oxidation of monochlorobenzene over iron oxide catalysts.
机构信息
Graduate Institute of Environmental Engineering, National Central University, ChungLi, Taoyuan County 320, Taiwan.
出版信息
Chemosphere. 2011 Feb;82(8):1090-5. doi: 10.1016/j.chemosphere.2010.12.046. Epub 2011 Jan 15.
In this study, we examined the experimental catalytic oxidation of gaseous monochlorobenzene (MCBz) with O₃ over Fe₂O₃ in a packed bed reactor to investigate the feasibility of economical low temperature decomposition at a high space velocity (SV). We investigated the effects of several reaction parameters (temperature, O₃ concentration, and SV) on the MCBz oxidation. At 150°C, the conversion of MCBz over Fe₂O₃ in the absence of O₃ was only 3%; it increased to 91% over Fe₂O₃ in the presence of 1,200 ppm of O₃ at a high SV of 83 s(-1). A long-term operation study revealed that the conversion of MCBz was stable for more than 96 h. In the steady state, the carbon and chlorine balances were 88% and 86%, respectively. Applying a Langmuir-Hinshelwood kinetic model, we estimated an activation energy of 16.7 kJ mol(-1) for MCBz oxidation over Fe₂O₃ in the presence of O₃.
在这项研究中，我们考察了在填充床反应器中使用 O₃ 对气态一氯苯（MCBz）进行实验性催化氧化的情况，以研究在高空间速度（SV）下经济低温分解的可行性。我们研究了几种反应参数（温度、O₃浓度和 SV）对 MCBz 氧化的影响。在 150°C 时，在不存在 O₃ 的情况下，Fe₂O₃ 上 MCBz 的转化率仅为 3%；而在高 SV 为 83 s(-1)、存在 1200 ppm O₃ 的情况下，转化率提高到 91%。长期运行研究表明，MCBz 的转化率稳定超过 96 小时。在稳态下，碳和氯的平衡分别为 88%和 86%。应用朗缪尔-欣谢尔伍德动力学模型，我们估计了在 O₃ 存在下 Fe₂O₃ 上 MCBz 氧化的活化能为 16.7 kJ mol(-1)。
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