Catalytic abatement of volatile organic compounds assisted by non-thermal plasma Part II. Optimized catalytic electrode and operating conditions
Catalytic abatement of volatile organic compounds assisted by non-thermal plasma Part II. Optimized catalytic electrode and operating conditions
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DOI：
10.1016/j.apcatb.2006.02.024
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发表时间：
2006-05
影响因子：
22.1
通讯作者：
C. Subrahmanyam;A. Renken;L. Kiwi-Minsker
中科院分区：
文献类型：
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作者：
C. Subrahmanyam;A. Renken;L. Kiwi-Minsker
研制了一种新型常压介质阻挡放电（DBD）催化反应器，用于去除挥发性有机化合物（VOCs）。DBD反应器的新颖之处在于金属催化剂兼作内电极。用烧结金属纤维（SMF）制备了圆柱形的催化电极。采用浸渍法制备了锰、钴氧化物。以甲苯为模型VOC化合物（空气中<1000ppm）进行分解研究。系统地改变了催化剂组成、甲苯浓度、施加电压和频率，以评价DBD反应器的性能。当甲苯浓度为100ppm时，在DBD反应器中，使用特定输入能量（SIE） ~ 235J/l实现了~ 100%的转化率，与SMF催化电极的化学组成无关，但观察到对co2的选择性是催化剂组成的函数。MnOx/SMF催化电极的全氧化性能最好。在295J/l的催化性能下，对co2的选择性为80%，甲苯转化率为100%。电极上没有碳固体残留物沉积。
A novel catalytic reactor with dielectric barrier discharge (DBD) at atmospheric pressure was developed for the abatement of volatile organic compounds (VOCs). The novelty of DBD reactor is the metallic catalyst serving also as the inner electrode. The catalytic electrode was prepared from sintered metal fibers (SMF) in the form of a cylindrical tube. Oxides of Mn and Co were deposited on SMF by impregnation. Decomposition of toluene taken as the model VOC compound (<1000ppm in air) was investigated. The catalyst composition, toluene concentration, applied voltage and frequency were systematically varied to evaluate the performance of the DBD reactor. At 100ppm of toluene, the conversion ∼100% was achieved in the DBD reactor using a specific input energy (SIE)∼235J/l independently of the chemical composition of the SMF catalytic electrode, but the selectivity to CO2was observed to be a function of the catalyst composition. The MnOx/SMF catalytic electrode showed the best performance towards total oxidation. At a SIE of 295J/l, the selectivity to CO2was 80% with 100% conversion of toluene. No carbon solid residues were deposited on the electrode.