Effects of biodiesel on continuous regeneration DPF characteristics

Chen, Tao; Xie, Hui; Gao, Guoyou; Wang, Wei; Chun, Huang

doi:10.1088/1755-1315/69/1/012060

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Sappok et al [24,25] analyzed the composition of the sediments in DPF that had been used for 3300 miles and found that the ash content in the DPF accounted for more than 50% of the total sediments. Chen et al [26,27] studied the flow characteristics and convection heat transfer process in the DPF inlet channel by establishing a DPF thermal regeneration numerical model and found that the ash deposited in the filter channel can affect exhaust gas circulation and heat transfer in the DPF; consequently, DPF wall temperature increases, and the carbon deposit oxidation rate increases. Liati et al [28,29] studied the microscopic morphology of PM and ash produced by burning diesel/biomass diesel and observed the distribution of ash and metal elements accumulated in the DPF channel using scanning electron microscopy and x-ray energy dispersive spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the microstructure and elemental occurrence state of residual ash-PM following DPF regeneration by injecting oxygen into non-thermal plasma

Shi¹,

Lu²,

Cai³

et al. 2021

Plasma Sci. Technol.

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Particulate matter (PM) capture tests were carried out on clean diesel particulate filters (DPFs) under different loads (25%, 50%, 75% and 100%). DPFs were regenerated by a non-thermal plasma (NTP) injection device. Raman spectroscopy and x-ray photoelectron spectroscopy were used to investigate changes in the microstructure and element occurrence state of the sediment in DPF channel before and after regeneration. The order of the PM samples decreased before NTP treatment as the load increased; the amorphous carbon content was high, and the oxidation activity was higher. After NTP treatment, the carbon atoms at the edge of the microcrystalline structure in the ash-PM samples were oxidized, and the structure was reorganized; in addition, the amorphous carbon content decreased, and the structure was more diversified. Before NTP, the C element of PM samples was the main component, and the content of the O element was relatively low. The C element occurred in the form of C-C, C-OH, and O-C=O functional groups, and O atoms were mainly combined with C-O. After NTP, the content of Na, P, S, Ca, and other inorganic elements in ash-PM samples was prominent because C atoms were removed by NTP active substances. There were two forms of S element occurrence (SO 4 2− and SO 3 2− ); the proportion of SO 4 2− was approximately 40%, and the proportion of SO 3 2− was approximately 60%. Study of the microstructure and element occurrence of the residues in the DPF channels improved our understanding of the mechanism of the low-temperature regeneration of DPF from NTP.

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