Quantitative estimation of the impact of ash accumulation on diesel particulate filter related fuel penalty for a typical modern on-road heavy-duty diesel engine

Zhang, Jun; Wong, Victor W.; Shuai, Shijin; Yu, Chen; Sappok, Alexander

doi:10.1016/j.apenergy.2018.08.071

Cited by 44 publications

(17 citation statements)

References 21 publications

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“…It is required that the DPF is regenerated periodically to remove the collected soot by combustion 2 . The commonly used regeneration methods include passive regeneration 3 and active regeneration 4 . Passive regeneration is a method to oxidize the accumulated particles using a catalyst or fuel additive at typical exhaust temperature 5 .…”

Section: Introductionmentioning

confidence: 99%

Soot Distribution and Thermal Regeneration of Marine Diesel Particulate Filter

Wang

2021

Preprint

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Particles from marine diesel engine exhaust gas have caused serious air pollution and human health. Diesel particulate filter (DPF) can effectively reduce particle emissions from marine diesel engines. The distribution and regeneration of soot in DPF are two important issues. In this paper, a mathematical model of a marine DPF was built up and the particle trap process and the regeneration dynamics were simulated. The results show that the cake soot mass concentrations during trap process increase linearly with the increase of the exhaust gas flows while the depth soot mass concentrations firstly increase linearly and then keep constant. Soot is mainly concentrated in the front and rear portion of the filter and less soot is in the middle. The soot distribution in the cake and depth layer shows the unevenness during the trap and regeneration process. The initial soot loadings have great effects on pressure drops and soot mass concentrations before regeneration, but little effect after regeneration. The exhaust gas temperature heated to 850 K can achieve 94% efficiency for the DPF regeneration. There is no obvious difference in pressure drops and soot mass concentrations between fast heating and slow heating. The heating duration of exhaust gas has an important impact on DPF regeneration.

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Section: Introductionmentioning

confidence: 99%

Soot Distribution and Thermal Regeneration of Marine Diesel Particulate Filter

Wang

2021

Preprint

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“…In the study of particulate filters, many scholars have extensively studied the regeneration characteristics of them. Zhang et al (2018) developed a one-dimensional full-scale diesel particulate filter (DPF) model to investigate the effect of ash deposition on DPF fuel loss. The results indicated that ash caused 0.02% to 0.42% fuel loss; regular ash cleaning saved 0.22% to 0.69% of fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis on a novel CGPFs for improve NOx conversion efficiency and particulate combustion efficiency to reduce exhaust pollutant emission

Xie

Zuo

Guan³

et al. 2021

Preprint

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Improving the NOx conversion efficiency and particulate combustion efficiency under cold start conditions (low temperature conditions) is still the main challenge faced by catalytic gasoline particulate filter system (CGPFs). In this study, the physical and mathematical models of novel CGPFs are proposed based on the computational fluid dynamics software. Then, the models are validated based on experiments, and the performances of conventional and novel CGPFs are analyzed comparatively. The comparison conclusions indicate that the NOx conversion efficiency of the novel CGPFs increases by 3.2% and the particulate combustion efficiency increases by 2.7% under the same operating condition. Finally, the effects of exhaust flow vf, exhaust oxygen concentration Co, exhaust NO concentration CNO and electric heating power Pe on the NOx conversion efficiency and particulate combustion efficiency are investigated. The weights of each influencing parameter on the NOx conversion efficiency and particulate combustion efficiency are explored by orthogonal tests. The conclusions show that the NOx conversion efficiency is increased by 3.6% and the particulate combustion efficiency is increased by 16.7% compared to the initial condition. This study has an important reference value for improving the purification efficiency of vehicle emission under cold start conditions.

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“…A balance between filtration and passive regeneration may be reached without an additional heat source and hence passive regeneration is more favourable than active regeneration strategies since it has a lower associated fuel penalty [26]. However, passive regeneration may not be viable at all operating conditions and hence active regeneration remain an essential part of DPF control stretagies [27].…”

Section: Introductionmentioning

confidence: 99%