School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
Chemosphere. 2022 Sep;302:134787. doi: 10.1016/j.chemosphere.2022.134787. Epub 2022 Apr 30.
A regeneration test of a diesel particulate filter (DPF) was conducted under different temperature conditions with air as the gas source and a nonthermal plasma (NTP) injection system. We investigated the influence of the ambient temperature on the DPF regeneration performance and the oxidative decomposition amount of particulate matter (PM) and analyzed the changes in the PM oxidation characteristics by thermogravimetric analysis (TGA). The higher the temperature, the lower the decomposition amount of PM was under constant temperature conditions. The decomposition amount of PM was the highest at 80 °C (3.74 g), and the PM at interface P2 was not completely removed. The volume concentrations of the DPF regeneration products (CO and CO) were higher under variable than constant temperature conditions. In addition, the peak temperature of interface P1 occurred 10-30 min earlier, complete regeneration occurred at interface P2, and DPF regeneration occurred faster than under temperature conditions. The initial temperature of the control device was 110 °C, and the maximum mass of PM oxidation decomposition was 4.26 g after regeneration for 15 min cooling to 80 °C. The main form of elemental carbon (EC) transformed into the low ignition point component and the oxidation activity was improved after NTP injection.
采用空气作为气源和非热等离子体（NTP）注入系统，在不同温度条件下对柴油机颗粒捕集器（DPF）进行了再生试验。研究了环境温度对 DPF 再生性能和颗粒物（PM）氧化分解量的影响，并通过热重分析（TGA）分析了 PM 氧化特性的变化。在恒温条件下，温度越高，PM 的分解量越低。在 80°C（3.74g）时，PM 的分解量最高，界面 P2 处的 PM 未完全去除。在变温条件下，DPF 再生产物（CO 和 CO）的体积浓度高于恒温条件。此外，界面 P1 的峰值温度提前了 10-30 分钟，界面 P2 处完全再生，DPF 再生速度比恒温条件下快。控制装置的初始温度为 110°C，再生 15 分钟冷却至 80°C 后，PM 氧化分解的最大质量为 4.26g。注入 NTP 后，元素碳（EC）的主要形式转化为低点火点成分，氧化活性提高。
