Effect of indirect non-thermal plasma on particle size distribution and composition of diesel engine particles

• Published in: Plasma science & technology Vol. 19; no. 11; pp. 59 - 66
• Main Author: 顾林波;蔡忆昔;施蕴曦;王静;濮晓宇;田晶;樊润林
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.11.2017
• Subjects: diesel engine; gas source flow rate; non-thermal plasma; particulate matter; 低温等离子体技术; 成分; 挥发性物质; 柴油机; 质量浓度; 间接; 非热等离子体; 颗粒粒径分布
• ISSN: 1009-0630; 1009-0630
• DOI: 10.1088/2058-6272/aa7f6e

To explore the effect of the gas source flow rate on the actual diesel exhaust particulate matter（PM）, a test bench for diesel engine exhaust purification was constructed, using indirect nonthermal plasma technology. The effects of different gas source flow rates on the quantity concentration, composition, and apparent activation energy of PM were investigated, using an engine exhaust particle sizer and a thermo-gravimetric analyzer. The results show that when the gas source flow rate was large, not only the maximum peak quantity concentrations of particles had a large drop, but also the peak quantity concentrations shifted to smaller particle sizes from 100 nm to 80 nm. When the gas source flow rate was 10L min^-1, the total quantity concentration greatly decreased where the removal rate of particles was 79.2%, and the variation of the different mode particle proportion was obvious. Non-thermal plasma（NTP） improved the oxidation ability of volatile matter as well as that of solid carbon. However, the NTP gas source rate had little effects on oxidation activity of volatile matter, while it strongly influenced the oxidation activity of solid carbon. Considering the quantity concentration and oxidation activity of particles, a gas source flow rate of 10L min^-1 was more appropriate for the purification of particles.