Effects of ash composition and ash stack heights on soot deposition and oxidation processes in catalytic diesel particulate filter

Fang, Jia; Zhang, Qian; Meng, Zhongwei; Luo, Yan; Ou, Juan; Du, Yuheng; Zhang, Zhilin

doi:10.1016/j.joei.2020.04.009

Cited by 59 publications

(12 citation statements)

References 40 publications

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“…With the increasing temperature, TG curves are achieved by recording the mass loss of the mixture continually, and the derivative thermogravimetric (DTG) curves are obtained by differentiating the TG curves. The starting temperature (Ts), ending temperature (Te), and peak temperature (Tp) are extracted to evaluate the oxidation performance [33] as identified in Figure 3. T s , T e and T p represent the temperature when the mixture starts to burn, the temperature corresponding to the end of combustion process and the temperature of maximum weight loss, respectively.…”

Section: Discussionmentioning

confidence: 99%

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

et al. 2021

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Diesel particulates are deposited in the diesel particulate filter and removed by the regeneration process. The Printex-U (PU) particles are simulated as the diesel soot to investigate the influence of thermal aging conditions on soot combustion performance with the addition of catalysts. The comprehensive combustion index S, combustion stability index Rw and peak temperature Tp are obtained to evaluate the combustion performance. Compared with the PU/Pt mixtures of different Pt contents (2 g/ft3, 3.5 g/ft3, and 5 g/ft3), the 10 g/ft3 Pt contents improve soot combustion with the outstanding oxygen absorption ability. When the weight ratio of PU/Pt mixture is 1:1, the promoted effect achieves the maximum degree. The S and Rw increase to 8.90 × 10−8 %2min−2°C−3 and 39.11 × 105, respectively, compared with pure PU. After the thermal aging process, the PU/Pt mixture with a 350 °C aging temperature for 10 h promotes the soot combustion the best when compared to pure PU particles. It is not good as the PU/Pt mixture without aging, because the inner properties of soot and Pt/Al2O3 catalyst may have been changed. The S and Rw are 9.07 × 10−8 %2min−2°C−3 and 38.39 × 105, respectively, which are close to the no aging mixture. This work plays a crucial role in understanding the mechanism of the comprehensive effect of soot and catalyst on soot combustion after the thermal aging process.

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Section: Discussionmentioning

confidence: 99%

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

et al. 2021

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“…We investigated the changes in the sample mass and temperature and the physicochemical properties and oxidation characteristics of different components in the sample. [27,28] The sampled quartz fiber paper filters were placed in a sampler consisting of a platinum wire and a corundum column crucible for analysis in a preset TGA program. The TGA procedure was divided into two stages, as shown in Figure S1.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

The effect of nonthermal plasma on the oxidation and removal of particulate matter under different diesel engine loads

Zhu

Cai

Shi

et al. 2021

Plasma Processes & Polymers

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“…After the implementation of the China 6 emission regulation, DPF becomes the mainstream after-treatment technology for new diesel vehicles and GDI vehicles, which can effectively realize the SPN reduction, including solid particle emissions during engine start-up [4]. A DPF has a wall-flow honeycomb channel structure which can effectively reduce particle emission and meet the requirements of emission regulations [5,6], whereas the traditional DPF technology is accompanied by some defects during the regeneration process, such as additional energy input, higher regeneration temperature to melt the filter [7,8] and so on, so that the catalysts become the significant tool to protect the DPF against the spike in local temperature. This type of DPF is called a catalytic DPF (CDPF), which can not only reduce the PM emission with high efficiency for heavy-duty diesel engines [9] but also efficiently lower regeneration temperature to protect the filter.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the DPF High-Temperature Filtration Performance under Different Particle Loadings and Particle Deposition Distributions

et al. 2021

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Based on DPF filtration and regeneration bench, the solid particle emission and high-temperature filtration characteristics of different carbon black particle loadings and particle deposition distributions are studied. The aerosol generator (PAlAS RGB 1000) is used to introduce carbon black particles into the inlet of a DPF, and the NanoMet3 particle meter is used to measure the solid particle concentration at the inlet and outlet of a DPF to obtain the filtration characteristics. Previous studies found that without inlet carbon black particles, there was an obvious solid particle emission peak at the outlet of the deposited DPF during the heating, and the concentration increased by 1–2 orders of magnitude. In this paper, the high-temperature filtration characteristics under steady-state temperature conditions are studied. It is found that a DPF can reduce the range of inlet fluctuating particles, and with the increase of temperature, the proportion of large solid particles in the outlet particles increases, and the size distribution range decreases. Particle loading has positive and negative effects on the DPF filtration, and the DPF has the optimal particle loading, which makes the comprehensive filtration efficiency improve the highest. The deposition transition section can make the deposition particles in the DPF uniform, but the filtration efficiency is reduced.

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Effects of ash composition and ash stack heights on soot deposition and oxidation processes in catalytic diesel particulate filter

Cited by 59 publications

References 40 publications

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

The effect of nonthermal plasma on the oxidation and removal of particulate matter under different diesel engine loads

Experimental Investigation on the DPF High-Temperature Filtration Performance under Different Particle Loadings and Particle Deposition Distributions

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