NTP低温再生DPF过程中颗粒物演化规律及温度自洽机制研究

项目拟围绕NTP低温再生DPF过程中颗粒物的演化规律及反应温度自洽等科学问题开展研究工作。构建DPF捕集颗粒物的台架试验系统，研究DPF对不同粒径、组分颗粒物的捕集特性，探寻颗粒物沉积特性对DPF过滤机制的影响规律；利用NTP喷射系统对DPF进行不同阶段的再生试验，通过现代测试分析技术研究DPF孔道内颗粒沉积物的宏观形貌、微观结构及氧化活性的变化规律，探究NTP对颗粒物剥离的作用机理及颗粒物氧化分解的演变规律；结合稳态温度和动态温度控制下的DPF完全再生试验，研究DPF孔道内颗粒沉积物的反应温度随控源温度的响应特性，剖析NTP活性物质O3和NO2的反应路径、颗粒物分解规律与反应温度的动态关联机制，揭示反应温度自洽对NTP活性物质热解与颗粒物分解的双重影响机制。项目预期研究成果可为NTP低温、高效再生DPF奠定理论和试验基础。

The research of this project is focused on the key scientific problem of PM evolution and temperature self-consistent in the process of DPF (Diesel Particulate Filter) low temperature regeneration based on NTP (Non-thermal Plasma). The bench test system is constructed to study the collection characteristics of particulate matter (PM) with different particle sizes and components for DPF and explore the influence of PM deposition characteristics on DPF filtration mechanism. The DPF regeneration experiments at different stages are carried out utilizing NTP injection system. The macro morphology, microstructure and oxidative activity of PM deposited in DPF are investigated by modern analysis determination techniques to explore the stripping mechanism of NTP on PM and the PM evolution of oxidation decomposition. The DPF complete regeneration tests under stable and dynamic temperature control are conducted respectively. The response characteristic of PM reaction temperature with the source temperature is studied and the dynamic association mechanism among the reaction path of NTP active substance, PM decomposition and the reaction temperature are analyzed. The dual influence mechanism of the reaction temperature self-consistent on the pyrolysis of NTP active material and the decomposition of PM is to be revealed. The expected research achievement of the project is promising to provide theoretical and experimental basis for the low temperature and high efficiency of DPF regeneration.