Novel soot loading prediction model of diesel particulate filter based on collection mechanism and equivalent permeability

Wang, Deyuan; Tan, Piqiang; Zhu, Lei; Wang, Yinhuan; Hu, Zhiyuan; Lou, Diming

doi:10.1016/j.fuel.2020.119409

Cited by 19 publications

(12 citation statements)

References 47 publications

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“…As PM gradually blocks the pores, the exhaust back pressure continues to rise, worsening fuel consumption and engine power. This has a negative impact on the DPF device itself and engine operation (Wang et al 2021a ). Therefore, DPF provides a safe and reliable method to remove accumulated PM, restore its PM capture capability, and ensure accessible operations.…”

Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

“…Perfect regeneration control includes accurate soot load prediction and reasonable regeneration strategy. The traditional prediction method based on pressure drop model has achieved good results in laboratory environment (Wang et al 2021a ). In addition, considering the unstable factors such as cross regional driving of vehicles and ash deposition, the optimized model based on fuel consumption, temperature monitoring and ash parameter correction shows better prediction performance than the traditional model (Dawei et al 2017 ) (Zhang et al 2018 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Zhang

Dong

Lan

et al. 2023

Environ Sci Pollut Res

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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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Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Zhang

Dong

Lan

et al. 2023

Environ Sci Pollut Res

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“…Equations ( 7) and (8) suggest that there are three main ways to enhance heat transfer [20]: 1. increase the Prandtl number and adjust the fluid physical properties, such as increasing the viscosity or specific heat capacity of the fluid; 2. increase the Reynolds number, such as enhancing the flow rate and reducing the channel radius; 3. increase the value of the dimensionless integral 1 0 U • ∇T dy, which is related to flow and physical properties, etc.…”

Section: Field Synergy Theorymentioning

confidence: 99%

“…Previous research has examined the temperature field, change in the deposition layer and pressure drop during regeneration. The numerical simulation method has been the main research technique [7][8][9]. Yamamoto et al applied the lattice Boltzmann method (LBM) and performed combustion simulations of the three-dimensional porous structure inside a monolith and the distribution of particulate matter deposited at different depths along the monolith wall at varying exhaust temperatures.…”

Section: Introductionmentioning

confidence: 99%

Synergy Analysis of the Influence of the Connection Cone on the Thermal Distribution during Regeneration

Dou

Aslam³

et al. 2021

Symmetry

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Diesel particulate filters (DPF) are typically used for particle filtration in vehicle exhausts after a treatment system. The monolith inside a DPF is a symmetrical column structure, frequently an axisymmetric cylinder structure where filtration and regeneration occur. Due to the complex structure before the symmetric monolith, the internal particle distribution is not uniform, which leads to an uneven temperature change when regeneration occurs. During thermal regeneration, the temperature field inside a DPF is affected by the particle load, exhaust temperature and exhaust flow. The relationship between the temperature gradient and velocity vector is also a key factor influencing regeneration performance. Based on the particle-loading test method, a bench for thermal distribution testing during regeneration was built. Via experiments and simulations, the temperature field in an axisymmetric monolith during particle combustion given an uneven particle distribution was analyzed. Through field synergy analysis of the temperature and velocity fields in the monolith, the influence of connection cones with different structures on heat transfer enhancement was studied. The results indicated that compared with a monolith with a conventional linear cone, the radial temperature gradient is 1.1 °C/mm lower, the area of enhanced regeneration is larger, and the regeneration rate is improved in the monolith with a streamlined cone.

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“…When exhaust gas flows through the porous wall from an inlet channel to an adjacent outlet channel, soot particles will be trapped inside or on top of the porous wall. However, as an incidental result of this working mode, the pressure loss will be increased inevitably with the continuous deposition of particles, worsening the power performance and economy of diesel engines. − Accordingly, the deposited particles need to be removed periodically or continuously, which is the so-called regeneration process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Progressive Evolution of Regeneration Pattern with Feed Temperature in a Wall-Flow-Catalyzed Diesel Particulate Filter

Wang

Deng

Yan

et al. 2022

Ind. Eng. Chem. Res.

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A two-dimensional transient model for wall-flowcatalyzed diesel particulate filter (DPF) regeneration is applied to investigate the regeneration process of DPF. User-defined subroutines are coupled to the commercial computational fluid dynamics code ANSYS Fluent to implement soot oxidation kinetics. Numerical results reveal that filter regeneration can proceed in three modes depending on the feed temperature: uniform combustion mode (Pattern I), transition mode (Pattern II), and propagating front mode (Pattern III). Pattern I is characterized by a small temperature rise of 20−160 K and a long regeneration time of about 600−2400 s. In contrast, Pattern III is characterized by a high peak temperature greater than 1400 K and a short regeneration time smaller than 40 s. Pattern II is the transition (mixed) mode in which the filter is regenerated by a moving reaction front which cannot conquer the whole filter length. For Pattern III, the propagating front originates from the downstream (subpattern a) to the midstream (sub-pattern b) to the upstream (sub-pattern c) as the feed temperature is increased from 893 to 943 K. Sub-pattern c results in the maximum peak temperature under all investigated operation conditions, while not shortening the regeneration time compared to sub-pattern a and sub-pattern b. These findings help to attain more favorable schemes for the thermal management optimization in DPF regeneration.

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Novel soot loading prediction model of diesel particulate filter based on collection mechanism and equivalent permeability

Cited by 19 publications

References 47 publications

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

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

Synergy Analysis of the Influence of the Connection Cone on the Thermal Distribution during Regeneration

Numerical Investigation on the Progressive Evolution of Regeneration Pattern with Feed Temperature in a Wall-Flow-Catalyzed Diesel Particulate Filter

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