Effect of the amount of trapped particulate matter on diesel particulate filter regeneration performance using non-thermal plasma assisted by exhaust waste heat
Effect of the amount of trapped particulate matter on diesel particulate filter regeneration performance using non-thermal plasma assisted by exhaust waste heat
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DOI：
10.1088/2058-6272/ab4d3c
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发表时间：
2019
影响因子：
1.7
通讯作者：
Shi Yunxi-;Cai Yixi;Xiao-hua Li;X. Pu;Zhao Nan;Wang Weikai
中科院分区：
文献类型：
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作者：
Shi Yunxi-;Cai Yixi;Xiao-hua Li;X. Pu;Zhao Nan;Wang Weikai
建立了利用废热辅助低温等离子体(NTP)技术再生柴油机微粒过滤器(DPF)的实验系统，并对不同捕集颗粒物(PM)量的DPF进行了再生实验。通过监测PM分解产物(COx)的浓度和DPF的内部温度来确定DPF的再生性能和NTP技术的热安全性。结果表明，在相同的NTP喷射系统工作条件下，CO、CO2浓度和PM分解质量随PM捕获量的增加而增加，而从DPF中逸出的NTP活性物质(O3)的浓度随NTP喷射系统工作条件的变化而降低。较高的PM捕获量促进了NTP和PM之间的氧化分解反应，提高了NTP活性物质的利用率。随着PM捕获量的增加，DPF内同一测点的峰值温度普遍升高，峰值温度的相变延迟。DPF再生过程中的温度峰值和温度梯度远低于失效极限值，表明NTP再生技术具有良好的耐热性，提高了DPF的使用寿命。
An experimental system of diesel particulate filter (DPF) regeneration using non-thermal plasma (NTP) technology assisted by exhaust waste heat was conducted and regeneration experiments of DPFs with different amounts of trapped particulate matter (PM) were conducted. The concentrations of the PM decomposition products (CO x) and the internal temperature of the DPF were monitored to determine the performance of DPF regeneration and thermal safety of the NTP technology. The results showed that the concentrations of CO and CO 2 and the mass of PM decomposition increased with the increase in the amount of captured PM, whereas the concentration of the NTP active substance (O 3) escaping from the DPF decreased under the same working conditions of the NTP injection system. A higher amount of captured PM promoted the oxidative decomposition reaction between NTP and PM and improved the utilization rate of the NTP active substances. The peak temperature at the same measuring point inside the DPF generally increased and the phases of the peak temperature were delayed as the amount of captured PM increased. The temperature peaks and temperature gradients during the DPF regeneration process were far lower than the failure limit value, which indicates that NTP regeneration technology has good thermal durability and increases the service life of the DPF.