Effect of temperature control conditions on DPF regeneration by nonthermal plasma.

Effects of porosity setting and multilayers of diesel particulate filter on the improvement of regeneration performance

Diesel particulate filter (DPF) is considered as an effective method to control particulate matter (PM) emissions from diesel engines, which is included in the mandatory installation list by more and more national/regional laws and regulations, such as CHINA VI, Euro VI, and EPA Tier3. Due to the limited capacity of DPF to contain PM, the manufacturer introduced a method of treating deposited PM by oxidation, which is called regeneration. This paper comprehensively summarizes the most advanced regeneration technology, including filter structure, new catalyst formula, accurate soot prediction, safe and reliable regeneration strategy, uncontrolled regeneration and its control methods. In addition, due to the change of working conditions in the regeneration process, the additional emissions during regeneration are discussed in this paper. The DPF is not only the aftertreatment device but also can be combined with diesel oxidation catalyst (DOC), selective catalytic reduction (SCR) and exhaust recirculation (EGR). In addition, the impact of DPF modification on the original system of some old models has been reasonably discussed in order to achieve emission targets. 

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Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Soot combustion characteristics of oxygen concentration and regeneration temperature effect on continuous pulsation regeneration in diesel particulate filter for heavy-duty truck

Effects of inlet velocity and structure parameters on the performance of a rotary diesel particulate filter for truck diesel engine based on fuzzy grey relational analysis.

Evolution of particulate matter deposited in the DPF channel during low-temperature regeneration by non-thermal plasma

Nonthermal plasma (NTP) technology can oxidize and decompose diesel particulate matter (PM) under much lower temperatures (≤200 °C) without catalyst, showing promise for potential applications. A self-made NTP generator was used to produce NTP gas that reacted with PM at a certain reaction temperature and reaction time, and the concentration of O3 in NTP was modified by adjusting the working parameters. Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and gas chromatography-mass spectrometry (GC-MS) were used to analyze changes in the surface functional groups, component oxidation activity, removal effect, and the soluble organic fraction (SOF) of PM samples before and after processing. As the O3 concentration increased, the effect of NTP on PM removal strengthened. PM surface functional groups can be converted from C–OH into CO under the action of NTP at high O3 concentrations. The oxidation activity of the volatile fraction (VF) and soot in PM can be substantially improved under high O3 concentrations. Higher O3 concentrations resulted in increases in the number of oxygen-containing groups in the molecular formula of SOF and the ratio of components. This study provide a certain reference value for the strategy of removing PM pollutants from diesel engines and even the atmosphere. 

Effect of nonthermal plasma with different ozone concentrations on the oxidation and removal of different components in particulate matter

Effect of Temperature-Controlled Conditions on the Decomposition of Particulate Matter Deposited in the Diesel Particulate Filter Channel by Treatment with Nonthermal Plasma

Yongling He

Papers

Evolution of particulate matter deposited in the DPF channel during low-temperature regeneration by non-thermal plasma

Effect of temperature control conditions on DPF regeneration by nonthermal plasma.

Effect of nonthermal plasma with different ozone concentrations on the oxidation and removal of different components in particulate matter

Effect of Temperature-Controlled Conditions on the Decomposition of Particulate Matter Deposited in the Diesel Particulate Filter Channel by Treatment with Nonthermal Plasma

Effect of Temperature Control Conditions on Dpf Regeneration by Non-Thermal Plasma