Properties and Performance of Diesel Particulate Filters of an Advanced Ceramic Material

Li, Cheng G; Mao, Frank; Swartzmiller, Steven B.; Wallin, Sten A.; Ziebarth, Robin

doi:10.4271/2004-01-0955

Cited by 23 publications

(9 citation statements)

References 4 publications

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“…The dehydrated clay reacts away roughly at the same point as the appearance of mullite, suggesting that mullite initially forms via net reactions such as fluorotopaz + dehydrated clay or silica = mullite + SiF 4 (1) 4Al 2 SiO 4 F 2 + Al 2 Si 2 O 7 = 2Al 5 Si 2 O 11.5 + 2SiF 4 (2) 10Al 2 SiO 4 F 2 + 3SiO 2 = 4Al 5 Si 2 O 11.5 + 5SiF 4 (3)…”

Section: Mechanism Of Fluorotopaz To Mullite Transformationmentioning

confidence: 96%

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Formation mechanism and microstructure development in acicular mullite ceramics fabricated by controlled decomposition of fluorotopaz

Pyzik

Todd

Han

2008

Journal of the European Ceramic Society

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Section: Mechanism Of Fluorotopaz To Mullite Transformationmentioning

confidence: 96%

“…[1][2][3][4] Mullite has been selected as a target material because of its ability to crystallize in the form of long needles and its well known stability at high temperature, high corrosion resistance, and high strength. The presence of mullite in sintered porcelain bodies has been known for a long time.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism and microstructure development in acicular mullite ceramics fabricated by controlled decomposition of fluorotopaz

Pyzik

Todd

Han

2008

Journal of the European Ceramic Society

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“…A different approach is described by Dow Global Technologies Inc. (Midland, MI) treating a pre‐sintered honeycomb made of clay and alumina by a catalytic gas‐phase synthesis reaction in a fluorine gas 40 . This results in the growth of needle‐like mullite grains building a porous interlocked network 41 …”

Section: Wall Flow Filter Materialsmentioning

confidence: 99%

Ceramic Diesel Particulate Filters

Adler

2005

Int J Applied Ceramic Tech

293

125

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Twenty‐five years of diesel particulate filter (DPF) developments have shown that ceramic materials are well‐suited candidates to fulfill the harsh requirements of exhaust after treatment. The introduction of DPF in passenger cars in Europe in 2000 was a real breakthrough from both a scientific and a commercial point of view. Different systems and filter materials can be used as DPF; however, at the moment silicon carbide wall flow filters seem to be at advantage. There is a continual demand for cost‐effective and reliable materials and systems forced by increasing legal emission standards.

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“…This paper reports new work in modelling pressure gradients through gelcast cellular ceramic foam filters. Honeycomb wall-flow filters [4][5][6][7][8] are, to date, the most commonly used type of DPF. Most of the validated models on pressure drop across DPFs are based on honeycomb wall-flow filters [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Modelling gas flow pressure gradients in gelcast ceramic foam diesel particulate filters

Adigio

Binner

Garner

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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DOI: 10.1243/09544070JAUTO508Abstract: New mathematical models are proposed that predict fluid flow pressure gradients in gelcast ceramic foam diesel exhaust particulate filters by considering the foam structure conceptually as serially connected orifices. The resulting multiple orifice mathematical (MOM) model is based on the sum of a viscous term derived from an extended Ergun model and the kinetic energy loss derived from the Bernoulli and conservation of mass equations. The MOM model was calibrated using experimental data obtained from measuring the air flowrate and pressure drop across a physical large-scale three-dimensional model of a cellular foam structure produced using rapid manufacturing techniques. The calibrated model was then validated using fluid flow data obtained from gelcast ceramic foam filters of various cell sizes and was found to require no empirical recalibration for each gelcast ceramic foam sample. The MOM model for clean filters was extended to predict pressure gradients of filters loaded with particulate matter (PM). The prediction of pressure gradients through gelcast ceramic filters using the MOM model for clean and PM-loaded cases was shown to be in reasonable agreement with experimental data. The models were finally applied to design a filter for a turbocharged, charge-cooled, 2.0 l, fourstroke, common rail, direct injection passenger car diesel engine.

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Properties and Performance of Diesel Particulate Filters of an Advanced Ceramic Material

Cited by 23 publications

References 4 publications

Formation mechanism and microstructure development in acicular mullite ceramics fabricated by controlled decomposition of fluorotopaz

Formation mechanism and microstructure development in acicular mullite ceramics fabricated by controlled decomposition of fluorotopaz

Ceramic Diesel Particulate Filters

Modelling gas flow pressure gradients in gelcast ceramic foam diesel particulate filters

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