Science and technology of catalytic diesel particulate filters

Setten, B.A.A.L. van; Makkee, Michiel; Moulijn, Jacob A.

doi:10.1081/cr-120001810

Cited by 517 publications

(344 citation statements)

References 77 publications

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“…The catalytic activities were measured in both loose (mixed with a spatula) and tight contact (ground in a mortar) mode with catalyst-soot mixtures in 4:1 wt/wt ratio, respectively [6,7]. Printex-U from Degussa S.A. is used as a model soot whose characterisation is reported elsewhere [8].…”

Section: Soot Oxidation In Tgamentioning

confidence: 99%

“…The large volume diesel engine market and its ever increasing demand in the heavy-duty engine sector, which emits large amounts of soot particulate matter, are of the concern and aftertreatment devices such as particulate traps are necessary [3][4][5][6][7]. Un-catalysed soot (carbon particles) oxidation to CO 2 with a typical diesel engine exhaust gas (having H 2 O, NO x , hydrocarbons (HC), CO and SO 2 ) occurs generally around 600°C [3][4][5][6][7]. When the diesel engine is fitted with an un-catalysed trap frequently high temperature regenerations are required, which can be uncontrolled, inefficient, and inconvenient.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome the contact problem catalysts, that work on different principles, have been developed [3][4][5][6][7][8]. The use of the fuel-borne catalysts incorporates a catalyst within the soot particle and increases the number of contact points and, therefore, decreases soot oxidation temperature significantly, from 600 to 350°C.…”

Section: Introductionmentioning

confidence: 99%

“…CeO 2 is used as a wellknown three-way catalyst for CO, HC, and NO x abatement, as fuel-born catalyst, and in catalysed soot filters in eliminating soot particulates [3][4][5][6][7][8][9]. Fuel-born ceria catalyst leads to the uniform formation of CeO 2 nano-particles trapped within soot particle.…”

Section: Introductionmentioning

confidence: 99%

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Potential rare-earth modified CeO2 catalysts for soot oxidation

Kamasamudram

Bueno‐López

Makkee

et al. 2007

Applied Catalysis B: Environmental

110

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The physico-chemical properties of ceria (CeO 2 ) and rare earth modified ceria (with La, Pr, Sm, Y) catalysts are studied and correlated with the soot oxidation activity with using O 2 and O 2 +NO. CeO 2 modified with La and Pr shows superior soot oxidation activity with O 2 compared with the unmodified catalyst. The improved soot oxidation activity of rare earth doped CeO 2 catalysts can be correlated to the increased meso/micro pore volume and the stabilisation of the external surface area. On the other hand, unreducible ions decrease the intrinsic soot oxidation activity of rare earth modified ceria with both O 2 and NO+O 2 due to the decreased amount of redox surface sites. The catalyst bulk oxygen storage capacity is not a critical parameter in determining the soot oxidation activity. The modification with Pr shows the best soot oxidation with both O 2 and O 2 +NO compared with all other catalysts.

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Section: Soot Oxidation In Tgamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Potential rare-earth modified CeO2 catalysts for soot oxidation

Kamasamudram

Bueno‐López

Makkee

et al. 2007

Applied Catalysis B: Environmental

110

View full text Add to dashboard Cite

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“…The idea of fuel additives has also been presented [5]. A combination of a diesel particulate filter (DPF) system with the catalytic combustion of soot seems to be the most promising and effective solution [6][7][8]. As such systems use catalysts based on platinum or palladium the increasing price of these noble metals creates demand for a cheaper alternative.…”

Section: Introductionmentioning

confidence: 99%

How to Efficiently Promote Transition Metal Oxides by Alkali Towards Catalytic Soot Oxidation

et al. 2016

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The effect of surface and bulk potassium promotion on the transition metal oxides (Mn, Fe, Co) catalytic activity in catalytic soot oxidation was investigated. The surface promotion was obtained via incipient wetness impregnation, whereas the bulk promotion-nanostructuration-was obtained via wet chemical synthesis or solid state reaction leading to mixed oxide materials. The introduction of potassium into the transition metal oxide matrix results in the formation of tunneled or layered structures, which enable high potassium mobility. The structure of the obtained materials was verified by powder X-ray diffraction and Raman spectroscopy and the catalytic activity in soot oxidation was determined by TPO-QMS and TGA. It was found that the surface promotion does not alter the metal oxide structure and leads to either enhancement (Mn, Fe) or deterioration (Co) of the catalytic activity. Simultaneously, the catalytic activity in soot combustion of the potassium structured oxides is strongly enhanced. The most active, cobalt oxide based catalyst significantly lowers the temperature of 50 % of soot conversion by *350°C comparing to the non-catalyzed process. The study allows for the establishment of rational guidelines for designing robust materials for DPF applications based on ternary metal oxides.

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