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Pore morphology and fractal dimension of ash deposited in catalyst diesel particulate filter

Environmental Science and Pollution Research volume 27, pages 11026–11037 (2020)Cite this article

Abstract

Diesel particle filter (DPF) has been widely acknowledged as the most effective way to mitigate particulate matter emitted from diesel engines. Over time, ash mainly derived from lubricating oil will deposit in DPF, showing negative influence to engine performance, fuel economy, service life of DPF, and so on. Recently, the investigation about DPF backpressure characteristics and DPF regeneration process considering ash has gained attention. As a porous material, ash will play a key role in the DPF permeability. Thus, the pore morphology and fractal dimension of ash derived from three kinds of lube are addressed in this work. The results show that the changing tendency of the micropore specific surface and pore volume is consistent with the ash content in lubricant oil, which is owing to the chemical interaction of Ca and S contained in the oil during the complex DPF regeneration. There is no significant changing tendency of the mesopore and macropore properties because of the heterogeneity and complexity of ash. According to the fractal analyses, the Avnir equation shows excellent predictive accuracy for the pore surface fractal dimension of ash, which reflects that the ash pore surfaces are irregular.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 51676017) and National Key R&D Plan (Grant No. 2017YFF0211802).

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Affiliations

  1. National Laboratory of Auto Performance & Emission Test, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, People’s Republic of China

    Haohao Wang, Jianwei Tan, Yunshan Ge, Jiachen Li, Xindi Yan, Chunjie Wang, Liqun Lv, Dan Tan, Weidong Tian & Lijun Hao

  2. Collaborative Innovation Centre of Electric Vehicles in Beijing, Beijing, 100081, People’s Republic of China

    Haohao Wang, Jianwei Tan, Yunshan Ge, Jiachen Li, Xindi Yan, Chunjie Wang, Liqun Lv, Dan Tan, Weidong Tian & Lijun Hao

  3. School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, People’s Republic of China

    Yalin Wang

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  1. Haohao Wang
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  2. Jianwei Tan
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  3. Yunshan Ge
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Correspondence to Yunshan Ge.

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Wang, H., Tan, J., Ge, Y. et al. Pore morphology and fractal dimension of ash deposited in catalyst diesel particulate filter. Environ Sci Pollut Res 27, 11026–11037 (2020). https://doi.org/10.1007/s11356-019-06945-7

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  • DOI: https://doi.org/10.1007/s11356-019-06945-7

Keywords

  • Ash
  • Diesel particle filter
  • Pore structure
  • Fractal dimensions