NO2和O3氧化柴油机微粒的对比试验研究*

作者：温佐华，杨国华，刘大海 日期：2009-06-24/span> 浏览：3724 查看PDF文档

NO2和O3氧化柴油机微粒的对比试验研究*

温佐华，杨国华，刘大海
(宁波大学 海运学院，浙江 宁波 315211)

摘要：柴油机微粒物质（PM）后处理最有效的措施是微粒捕集器(DPF)技术，而DPF技术的关键点在于其再生。为了降低DPF的再生温度，首先采用玻璃纤维无胶滤筒捕集PM，然后在管式反应器内加入氧化性气体氧化PM，并通过试验对比研究了NO2和O3对PM的氧化效果。研究结果表明，NO2氧化PM的起燃温度为250 ℃，而O3在155 ℃时开始明显氧化PM，适宜温度为200 ℃～240 ℃；提高了臭氧或NO2气体浓度，明显加快了氧化速度；O3可以在低温下快速氧化PM，且不需任何催化剂。
关键词：柴油机微粒物质；臭氧；NO2；氧化；微粒捕集器
中图分类号：TK421+.5文献标识码：A文章编号：1001-4551(2009)06-0104-03

Experiment on contrast O3 to NO2 oxidation of diesel particulate matter
WEN Zuohua, YANG Guohua, LIU Dahai
(College of Maritime, Ningbo University, Ningbo 315211, China)
Abstract: The most effective measure of diesel particulate matter(PM) postprocessing is the diesel particulate filter(DPF) technology, and the key of DPF lies in its regeneration. In order to reduce the regeneration temperature of DPF, an experimental study was carried out by two steps. The PM from diesel engine was captured by glass fiber filter firstly. Then oxidation of PM was carried by oxidizing gas in a tube furnace. The experimental study on contrast ozone to NO2 oxidation of PM was done. The results indicate that the oxidation reaction between NO2 and PM start combustion at 250 ℃, but ozone and PM start obviously at 155 ℃, the optimal oxidation reaction temperature window is between 200 ℃ and 240 ℃. It gets the higher ozone or NO2 concentration and the faster oxidation reaction. The ozone can oxide PM fast under no any catalyst at lowtemperature.
Key words: diesel particulate matter(DPM); ozone; NO2; oxidation; diesel particulate filter(DPF)
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