Numerical Study on Forced Regeneration of Wall-Flow Diesel Particulate Filters

Miyairi, Y.; Miwa, Shuichiro; Abe, F.; Xu, Zhiming; Nakasuji, Yoshizumi

doi:10.4271/2001-01-0912

Cited by 42 publications

(36 citation statements)

References 5 publications

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“…Fig. 3 shows the comparison of the Miyari's measured result model [4] of temporal evolution of the wall temperature at five points on the DPF center axis and the present calculated result. A gas temperature of 600°C and a flow rate of 0.014 kg/s are used as the regeneration conditions with DPF dimensions of '144 mm (D) Â 152 mm (L)'.…”

Section: Model Validationsmentioning

confidence: 88%

“…Their results were in good agreement with the experimental data. Miyairi et al numerically studied the influence of diameter, length and cell density on the maximum temperature of the DPF during regeneration under steady state conditions using a quasi onedimensional model [4]. Yamaguchi et al experimentally studied the effect of the ratio of the length to diameter of a monolith on temperature distribution during regeneration.…”

Section: Introductionmentioning

confidence: 99%

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Numerical design of the diesel particulate filter for optimum thermal performances during regeneration

2009

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Section: Model Validationsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Numerical design of the diesel particulate filter for optimum thermal performances during regeneration

2009

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“…As expected, close to filter exit ( z / L = 0.9), the concentration of oxygen is lower to that expected by the reaction-only model, because diffusion results in overall increased oxygen consumption up to that axial point. The authors performed preliminary validation of this reactiondiffusion model using the Miyairi et al (2001) 12 mils (0.3048 mm) wall thickness in a propane burner. The regeneration temperature was 600 ° C and the flow rate equal to 0.014 kg s -1 .…”

Section: Oxygen Diffusion Impact On Regenerationmentioning

confidence: 99%

Catalyzed diesel particulate filter modeling

Koltsakis

Haralampous

Depcik

et al. 2013

Reviews in Chemical Engineering

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An increasing environmental concern for diesel particulate emissions has led to the development of efficient and robust diesel particulate filters (DPF). Although the main function of a DPF is to filter solid particles, the beneficial effects of applying catalytic coatings in the filter walls have been recognized. The catalyzed DPF technology is a unique type of chemical reactor in which a multitude of physicochemical processes simultaneously take place, thus complicating the tasks of design and optimization. To this end, modeling has contributed considerably in reducing the development effort by offering a better understanding of the underlying phenomena and reducing the excessive experimental efforts associated with experimental testing. A comprehensive review of the evolution and the most recent developments in DPF modeling, covering phenomena such as transport, fluid mechanics, filtration, catalysis, and thermal stresses, is presented in this article. A thorough presentation on the mathematical model formulation is given based on literature references and the differences between modeling approaches are discussed. Selected examples of model application and validation versus the experimental data are presented.

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“…The initial and boundary conditions for the integrated DOC-DPF model used in the present study are obtained from experimental and simulation data presented by Triana's work (2005) and summarized in Miyairi et al (2001) are employed for the validation of the pure thermal regeneration technique to show a basic prediction performance of thermal regeneration behavior under steady-state engine operating conditions. The specifications of the DPF, initial conditions, and kinetic parameters used in the DPF model validation are summarized in Table 4.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

“…Specification of the DPF and initial conditions used in DPF model validation(Miyairi et al, 2001), and kinetic parameters used in the present study.…”

mentioning

confidence: 99%

Computational study on the effects of volume ratio of DOC/DPF and catalyst loading on the PM and NOx emission control for heavy-duty diesel engines

Lee

Jeong

Kim

et al. 2008

Int.J Automot. Technol.

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The use of a diesel particulate filter (DPF) in a diesel aftertreatment system has proven to be an effective and efficient method for removing particulate matter (PM) in order to meet more stringent emission regulations without hurting engine performance. One of the favorable PM regeneration technologies is the NO 2 -assisted regeneration method due to the capability of continuous regeneration of PM under a much lower temperature than that of thermal regeneration. In the present study, the thermal behavior of the monolith during regeneration and the conversion efficiency of NO 2 from NO with an integrated exhaust system of a diesel oxidation catalyst (DOC) and DPF have been predicted by one-channel numerical simulation. The simulation results of the DOC, DPF, and integrated DOC-DPF models are compared with experimental data to verify the accuracy of the present model for the integrated DOC and DPF modeling. The effects of catalyst loading inside the DOC and the volume ratio between the DOC and DPF on the pressure drop, the conversion efficiency, and the oxidation rate of PM, have been numerically investigated. The results indicate that the case of the volume ratio of 'DOC/DPF=1.5' within the same diameter of both monoliths produced close to the maximum conversion efficiency and oxidation rate of PM. Under the engine operating condition of 175 kW at 2200 rpm, 100% load with a displacement of 8.1, approximately 55 g/ft 3 of catalyst (Pt) loading inside the DOC with the active Pt surface of 5.3 m 2 /g pt was enough to maximize the conversion efficiency and oxidation rate of PM.

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Numerical Study on Forced Regeneration of Wall-Flow Diesel Particulate Filters

Cited by 42 publications

References 5 publications

Numerical design of the diesel particulate filter for optimum thermal performances during regeneration

Numerical design of the diesel particulate filter for optimum thermal performances during regeneration

Catalyzed diesel particulate filter modeling

Computational study on the effects of volume ratio of DOC/DPF and catalyst loading on the PM and NOx emission control for heavy-duty diesel engines

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