摘要
基于拉曼光谱和热重分析试验对柴油机排气颗粒物的理化特性变化规律进行研究。利用拉曼光谱分析发现,当转速升高时,颗粒物D1(1360cm^(-1))峰半高宽、ID1/IG(D1峰与G峰的相对强度)及ID3/IG(D3峰与G峰的相对强度)呈升高的趋势;当负荷变大时,D1峰半高宽、ID1/IG及ID3/IG呈减小的趋势。通过热重分析发现,当发动机处于高转速时,排放颗粒物会有较强的氧化性;当柴油机处于高负荷时,排放颗粒物则有较弱的氧化性。研究结果表明,发动机在低负荷或高转速时,颗粒物具有较强的无序性,易于被氧化,有利于颗粒物捕集器的再生。
The paper focuses on the physicochemical characteristics of particulate matter(PM)from diesel engine exhaust under different working conditions using Raman spectroscopy and thermogravimetric analyzer.Raman spectroscopy analysis indicated that the full width at half maximum of D1 peak,ID1/IG and ID3/IG increased at high speed or low load.Thermogravimetric analysis showed that the diesel exhaust PM will have stronger oxidation at high speed and weaker oxidation at high load.These results demonstrated that the disorder degree of PM increases,and it is easy to be oxidized,which is beneficial to the regeneration of the diesel particulate filter under high speed or low load.
作者
张永强
杨皓
李聪
Zhang Yongqiang;Yang Hao;Li Cong(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《农业装备与车辆工程》
2021年第7期1-5,共5页
Agricultural Equipment & Vehicle Engineering
基金
国家自然科学基金资助项目(51505275)。
关键词
柴油机
颗粒物
拉曼光谱
热重分析
理化特性
diesel engine
particulate matter
Raman spectroscopy
thermogravimetric analysis
physicochemical characteristics
