Endothermic Phenomena in Diesel Particulate Filters During Regeneration

Endothermic phenomena were identified during the regeneration of the porous ceramic diesel particulate trap. These phenomena were experimentally investigated and they were found to be related to the cerium content of the fuel used for the trap loading and regeneration and to the soot mass accumulated in the trap. Carbon mass and energy balance through the regeneration process reveals that these phenomena cannot be attributed to chemical reactions in the trap. It is assumed that they are due to the effect of regeneration on the radial flow distribution through the trap, an assumption remaining to be experimentally tested.

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Lattice Boltzmann simulations for wall-flow dynamics in porous ceramic diesel particulate filters

Applied Surface Science ◽

10.1016/j.apsusc.2017.08.074 ◽

2018 ◽

Vol 429 ◽

pp. 72-80 ◽

Cited By ~ 7

Author(s):

Da Young Lee ◽

Gi Wook Lee ◽

Kyu Yoon ◽

Byoungjin Chun ◽

Hyun Wook Jung

Keyword(s):

Lattice Boltzmann ◽

Porous Ceramic ◽

Flow Dynamics ◽

Diesel Particulate ◽

Diesel Particulate Filters ◽

Particulate Filters ◽

Lattice Boltzmann Simulations ◽

Wall Flow

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Experimental investigation of the pressure drop in porous ceramic diesel particulate filters

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1243/09544070260340862 ◽

2002 ◽

Vol 216 (9) ◽

pp. 773-784 ◽

Cited By ~ 33

Author(s):

G A Stratakis ◽

D L Psarianos ◽

A M Stamatelos

Keyword(s):

Pressure Drop ◽

Porous Ceramic ◽

Computer Calculation ◽

Fuel Additive ◽

Complex Flow ◽

Diesel Particulate ◽

Diesel Particulate Filters ◽

Particulate Filters ◽

Experimental Apparatus ◽

Soot Loading

Understanding of the mechanisms that affect flow and pressure drop in porous ceramic diesel particulate filters is important in the design optimization of this class of diesel exhaust after- treatment systems. Furthermore, determination of the parameters involved in the calculation of pressure drop as a function of collected soot mass is important for successful filter loading and regeneration modelling. This paper presents the results of an experimental analysis of pressure drop as a function of the geometric and operating parameters of cordierite and SiC diesel filters. Single- cell filters from cordierite and silicon carbide were prepared to single out any effects from the complex flow processes that take place in a full-sized filter. The product of soot layer permeability and density was experimentally determined by employing a specially designed experimental apparatus. The calculation was supported by a simple computer calculation that is also presented in this paper. The distribution of soot loading inside the channels of a full-sized filter, in various loaded and partially regenerated conditions, was assessed by connecting the apparatus to discharge through selected channels of the filter. The results are shown to improve understanding of the effects of partial regeneration and fuel additive residuals on filter back pressure and flow and soot loading distribution.

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