The Second Generation of Catalyzed Diesel Particulate Filter Systems for Passenger Cars - Particulate Filters with Integrated Oxidation Catalyst Function-

2005 ◽  
Author(s):  
M. Pfeifer ◽  
M. Votsmeier ◽  
M. Kögel ◽  
P. C. Spurk ◽  
E. S. Lox ◽  
...  
Keyword(s):  
Diesel Particulate Filter ◽  
Second Generation ◽  
Oxidation Catalyst ◽  
Particulate Filter ◽  
Passenger Cars ◽  
Diesel Particulate ◽  
Particulate Filters ◽  
Catalyzed Diesel Particulate Filter

Numerical Simulation of Soot Deposition in Diesel Particulate Filters

2006 ◽  
Author(s):  
O. Chiavola ◽  
G. Falcucci
Keyword(s):  
Diesel Particulate Filter ◽  
Particulate Filter ◽  
Diesel Particulate ◽  
Particulate Filters ◽  
Soot Deposition ◽  
Operation Period ◽  
Steady Simulation ◽  
Commercial Device ◽  
Engine Power ◽  
Catalyzed Diesel Particulate Filter

The present work treats the problems and phenomena related to the soot deposition inside a modern Diesel particulate filter, in order to realize a numerical model able to analyze how particulate matter lays down and grows over the porous walls inside a non-catalyzed diesel particulate filter. The geometry of a commercial device has been imported in a 3D CFD code and the phenomena related to the fluid while it passes through the porous media of the filter have been viewed upon with an unsteady approach for different values of engine power and torque. The obtained velocity fields have been used to calculate the profile of deposited soot after a chosen operation period and the geometry of the filter has been then refreshed for the subsequent quasi-steady simulation. The backpressure due to the growing of the soot layer has been calculated.

Experimental study of lubricant-derived ash effects on diesel particulate filter performance

2019 ◽  
pp. 146808741987457 ◽  
Author(s):  
Jun Zhang ◽  
Yanfei Li ◽  
Victor W Wong ◽  
Shijin Shuai ◽  
Jinzhu Qi ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Diesel Particulate Filter ◽  
Particulate Filter ◽  
Maximum Temperature ◽  
Particle Emissions ◽  
Diesel Particulate ◽  
Particulate Filters ◽  
Filter Performance ◽  
Soot Loading ◽  
Active Regeneration

Diesel particulate filters are indispensable for diesel engines to meet the increasingly stringent emission regulations. A large amount of ash would accumulate in the diesel particulate filter over time, which would significantly affect the diesel particulate filter performance. In this work, the lubricant-derived ash effects on diesel particulate filter pressure drop, diesel particulate filter filtration performance, diesel particulate filter temperature field during active regeneration, and diesel particulate filter downstream emissions during active regeneration were studied on an engine test bench. The test results show that the ash accumulated in the diesel particulate filter would decrease the diesel particulate filter pressure drop due to the “membrane effect” when the diesel particulate filter ash loading is lower than about 10 g/L, beyond which the diesel particulate filter pressure drop would be increased due to the reduction of diesel particulate filter effective volume. The ash loaded in the diesel particulate filter could significantly improve the diesel particulate filter filtration efficiency because it would fill the pores of diesel particulate filter wall. The diesel particulate filter peak temperature during active regeneration is consistent with the diesel particulate filter initial actual soot loading density prior to regeneration at various diesel particulate filter ash loading levels, while the diesel particulate filter maximum temperature gradient would increase with the diesel particulate filter ash loading increase, whether the diesel particulate filter is regenerated at the same soot loading level or the same diesel particulate filter pressure drop level. The ash accumulation in the diesel particulate filter shows little effects on diesel particulate filter downstream CO, total hydrocarbons, N2O emissions, and NO2/NO x ratio during active regeneration. However, a small amount of SO2 emissions was observed when the diesel particulate filter ash loading is higher than 10 g/L. The ash accumulated in the diesel particulate filter would increase the diesel particulate filter downstream sub-23 nm particle emissions but decrease larger particle emissions during active regeneration.

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