| 气相甲苯光催化降解反应动力学及机理 |
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| 引用本文： | 殷永泉,郑艳,苏元成,崔琼,崔兆杰.气相甲苯光催化降解反应动力学及机理[J].过程工程学报,2009,9(3):536-540. |
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| 作者姓名： | 殷永泉 郑艳 苏元成 崔琼 崔兆杰 |
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| 作者单位： | 1. 山东大学环境科学与工程学院,山东,济南,250100
2. 厦门大学近海海洋环境科学国家重点实验室,福建,厦门,361005 |
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| 摘 要： | 以紫外光为光源，锐钛矿型TiO2为催化剂，研究了气相甲苯光催化降解过程，并探讨了降解机理. 结果表明，甲苯光催化降解过程符合一级反应动力学方程，甲苯初始浓度越高，反应速率常数越小. 甲苯光催化降解的主要中间产物为己烷和苯. 在紫外光和TiO2作用下，甲苯经脱甲基反应生成苯和甲基，甲基可与甲苯分解产生的3-戊烯炔生成2,4-己二烯，经加氢转化为己烷.
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| 关 键 词： | 甲苯 光催化 动力学 机理 |
| 收稿时间： | 2008-12-25 |
| 修稿时间： | 2009-3-16 |
Reaction Kinetics and Mechanism of Photocatalytic Degradation of Gaseous Toluene |
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| YIN Yong-quan,ZHENG Yan,SU Yuan-cheng,CUI Quan,CUI Zhao-jie.Reaction Kinetics and Mechanism of Photocatalytic Degradation of Gaseous Toluene[J].Chinese Journal of Process Engineering,2009,9(3):536-540. |
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| Authors: | YIN Yong-quan ZHENG Yan SU Yuan-cheng CUI Quan CUI Zhao-jie |
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| Affiliation: | 1. School of Environmental Science and Engineering;Shandong University;Jinan;Shandong 250100;China;2. State Key Laboratory of Marine Environmental Science;Xiamen University;Xiamen;Fujian 361005;China |
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| Abstract: | Chemical kinetics and intermediates in photocatalytic degradation of gaseous toluene were investigated under UV irradiation with TiO2. According to the intermediates analyzed by GC/MS, possible mechanism for photocatalytic degradation of gaseous toluene was proposed. The result showed that the degradation of toluene followed the first-order chemical kinetics. With the increase of initial toluene concentration, the reaction rate of photocatalytic degradation of toluene increased and the reaction rate decreas... |
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| Keywords: | toluene photocatalysis kinetics mechanism |
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