Treatment of Volatile Organic Compounds using Catalyst Assisted Silent Discharge

使用催化剂辅助无声放电处理挥发性有机化合物

基本信息

批准号：
10558064
负责人：
SEKIGUCHI Hidetoshi
金额：
$ 7.74万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10558064/
关键词：
Silent Discharge Volatile Organic Compounds Benzene Methanol Catalyst Ozone 大気圧低温プラズマ分野

项目摘要

The treatment of volatile organic compounds (VOCs) was carried out using atmospheric silent discharge. The catalyst was put on the electrode and the effect of the interaction between plasma and catalyst on the decomposition was examined. Methanol and benzene was used as a model of VOCs. The conversions of both methanol and benzene were increased with applied voltage and gas residence time without catalyst. The decomposition rate constant was related with discharge power affected by both applied voltage and electrode gap. The catalyst used here was Pt loading catalyst supported by alumina. The catalytic decomposition was not observed without plasma. However the decomposition was promoted by the catalyst under the discharge condition. Higher enhancement was observed at lower concentration of benzene. The effect of the amount of Pt loading was not apparently observed. The main product gases were carbon dioxide and carbon monoxide. The trace of phenol was detected by GC-MS, however the other toxic substances were not observed. Much amount of ozone was produced by the discharge. The ozone, however, is not considered to affect the decomposition. The deactivation of the catalyst was observed in the benzene decomposition because of the formation of yellow solid materials deposited on the catalyst. The deactivation proceeded faster for smaller Pt loading catalyst. The vanadium oxide was also investigated as the catalyst. The results also showed the enhancement of the decomposition of benzene without the deactivation of the catalyst. The research summarized that the silent discharge with the catalyst was effective method for the control of VOCs in low concentration without much power consumption.

使用大气静音放电进行挥发性有机化合物（VOC）的处理。将催化剂放在电极上，并检查了血浆和催化剂之间相互作用对分解的影响。甲醇和苯被用作VOC的模型。甲醇和苯的转化均随着无催化剂的施加电压和气体停留时间而增加。分解速率常数与受施加电压和电极间隙影响的放电功率有关。这里使用的催化剂是由氧化铝支撑的PT载荷催化剂。没有等离子体观察到催化分解。但是，分解是由催化剂在放电条件下促进的。在较低的苯浓度下观察到较高的增强。显然未观察到PT载荷量的影响。主要产品气体是二氧化碳和一氧化碳。 GC-MS检测到苯酚的痕迹，但是未观察到其他有毒物质。排放产生了大量的臭氧。但是，臭氧不被认为影响分解。由于催化剂上沉积的黄色固体材料的形成，在苯分解中观察到催化剂的失活。对于较小的PT加载催化剂，停用速度更快。还研究了氧化钒作为催化剂。结果还显示了苯分解的增强，而没有催化剂的失活。研究总结说，用催化剂的无声排放是控制低浓度的VOC而没有太多功耗的有效方法。