Micro-structural and components evolution mechanism of particular matter from diesel engines with non-thermal plasma technology
Micro-structural and components evolution mechanism of particular matter from diesel engines with non-thermal plasma technology
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非热等离子体技术柴油机特定物质的微观结构和组分演化机制
DOI：
10.1016/j.applthermaleng.2015.08.010
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发表时间：
2015-12
影响因子：
6.4
通讯作者：
Zhijun Li
中科院分区：
文献类型：
--
作者：
Wenye Gu;Lili Lei;Yixi Cai;Zhijun Li
本文研究了非热等离子体（NTP）技术对柴油PM烟尘排放和理化性质（形貌、粒径、化学成分和着火温度）的影响。在台架试验的基础上，采用NTP技术在小型直喷柴油机上进行了试验。采用GC-MS、SEM、EDX、TGA等检测了PM样品的理化性质。NTP处理后的PM样品以碳原子数小于18的碳氢化合物为主，碳原子数大于20的碳氢化合物较少。SEM和EDX分析表明，NTP氧化可显著降低团聚度和平均粒径。TGA结果表明，NTP处理前后PM样品在氧环境中的终燃温度分别为670.03℃和550.54℃。平均温差接近120℃，表明NTP技术可以有效降低柴油机PM排放的燃烧温度。
The present study is about the influence of non-thermal plasma (NTP) technology on soot emissions and physico-chemical properties (morphology, particle size, chemical composition and ignition temperature) of diesel PM. Experiments have been carried out using a small direct injection diesel engine with NTP technology based on a bench test. The physico-chemical properties of PM samples were detected by GC–MS, SEM, EDX, and TGA. PM samples after NTP treatment consisted of mainly hydrocarbons with less than 18 carbon atoms and few hydrocarbons with higher than 20 carbon atoms. Analysis by SEM and EDX showed that the agglomeration degree and the mean spherule diameters were markedly reduced by NTP oxidation. TGA showed that the ending combustion temperatures of PM samples in oxygen environment were 670.03 °C and 550.54 °C before and after NTP treatment, respectively. The mean temperature difference was nearly 120 °C, which indicated that NTP technology could effectively reduce the burning combustion temperature of diesel PM emissions.
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