Catalytic combustion of diesel soot particles. Activity and characterization of Co/MgO and Co,K/MgO catalysts

Querini, C.A.; Ulla, Maria Alicia del H.; Requejo, Félix G.; Soria, J.; Sedrán, Ulises; Miró, Eduardo Ernesto

doi:10.1016/s0926-3373(97)00032-5

Cited by 96 publications

(50 citation statements)

References 16 publications

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“…In addition, the two broad shoulders at 1500 and 1390 cm 1 correspond to the surface carbonate species. 7,14 The above-mentioned characteristic bands of La 2 O 2 CO 3 and La(OH) 3 are also observed on the infrared spectrum of K(400) (Fig. 2), in clear agreement with XRD results.…”

Section: Characterization Of the Nitrate And Carbonate Speciessupporting

confidence: 85%

Surface characterization of Co,K/La₂O₃ catalysts used for the catalytic combustion of diesel soot

Moggia

Milt

Ulla

et al. 2003

Surface & Interface Analysis

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Catalysts of Co,K/La 2 O 3 have been prepared by wet impregnation. The samples have been calcined at 400• C and 700 • C and have been characterized for phase composition using x-ray diffraction and Fourier transform infrared spectroscopy. The XPS analysis of the samples has been obtained by examination of the O 1s, K 2p, C 1s and La 3d spectral regions. The XPS data are discussed with respect to the calcination temperatures and the soot combustion performed in the spectrometer reaction chamber. Analysis of the XPS data indicates considerable carbonation of the surfaces of all samples, even after burning the soot. The K/La 2 O 3 solid presents the highest content of surface carbonated species, showing the highest catalytic activity for soot combustion. Interaction of the catalysts with CO 2 is studied by temperatureprogrammed desorption and microbalance experiments. Kinetic studies and surface characterization of the potassium-containing samples suggest that an appropriate surface potassium concentration is necessary for a synergetic action between potassium and lanthanum. In the cobalt-containing catalysts calcined at 700• C, an increase is observed in the concentration of the outer-layer perovskite species when the potassium content increases, following the same tendency observed in the bulk. Such LaCoO 3 species would limit the reaction of lanthanum with CO 2 .

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Section: Characterization Of the Nitrate And Carbonate Speciessupporting

confidence: 85%

Surface characterization of Co,K/La₂O₃ catalysts used for the catalytic combustion of diesel soot

Moggia

Milt

Ulla

et al. 2003

Surface & Interface Analysis

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“…The development of novel soot combustion catalysts have been reported in several recent studies [1][2][3][4][5][6][7][8][9][10][11][12]. Neeft et al have shown that the nature of the contact (''loose'' or ''tight'') between the soot and the catalyst can affect the relative effectiveness of a catalyst in promoting soot oxidation [2].…”

Section: Diesel Soot Combustionmentioning

confidence: 99%

Combinatorial synthesis and characterization of alkali metal doped oxides for diesel soot combustion

Kilroy

McGinn

2004

Catalysis Today

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“…Catalytic regeneration has already been suggested as the best approach and intensive efforts are being made to develop suitable catalysts. The regeneration catalysts should possess excellent catalytic activity at low temperature with high thermal and chemical stability [2][3][4][5][6]. Perovskite type oxides are good oxidation catalysts and show potential as effective PM oxidation catalyst for the DPF regeneration as well as for the oxidation of Soluble Organic Fraction (SOF).…”

Section: Introductionmentioning

confidence: 99%

Low Cost, Ceria Promoted Perovskite Type Catalysts for Diesel Soot Oxidation

et al. 2007

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Perovskite type catalysts with SrCoO 3 and Sr 0.8 Ce 0.2 CoO 3 compositions have been prepared by co-precipitation and other methods and, their catalytic activity towards diesel particulate matter (PM)/carbon oxidation has been evaluated under the loose contact condition. These catalysts show excellent catalytic activity for PM/carbon oxidation, despite their low surface area and under the loose contact condition. The synergistic effects of Ce incorporation in perovskite and presence of a small amount of potassium appears to be responsible for the high soot oxidation activity of these perovskite type materials. The Ce incorporation seems to be contributing by enhancing the redox property of the catalyst, while it appears unlikely that potassium is contributing by improving the catalyst-soot contact through its volatization. The catalysts show excellent thermal stability and stable activity under repeated cycles of use.

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Catalytic combustion of diesel soot particles. Activity and characterization of Co/MgO and Co,K/MgO catalysts

Cited by 96 publications

References 16 publications

Surface characterization of Co,K/La₂O₃ catalysts used for the catalytic combustion of diesel soot

Surface characterization of Co,K/La₂O₃ catalysts used for the catalytic combustion of diesel soot

Combinatorial synthesis and characterization of alkali metal doped oxides for diesel soot combustion

Low Cost, Ceria Promoted Perovskite Type Catalysts for Diesel Soot Oxidation

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Catalytic combustion of diesel soot particles. Activity and characterization of Co/MgO and Co,K/MgO catalysts

Cited by 96 publications

References 16 publications

Surface characterization of Co,K/La2O3 catalysts used for the catalytic combustion of diesel soot

Surface characterization of Co,K/La2O3 catalysts used for the catalytic combustion of diesel soot

Combinatorial synthesis and characterization of alkali metal doped oxides for diesel soot combustion

Low Cost, Ceria Promoted Perovskite Type Catalysts for Diesel Soot Oxidation

Contact Info

Product

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Surface characterization of Co,K/La₂O₃ catalysts used for the catalytic combustion of diesel soot

Surface characterization of Co,K/La₂O₃ catalysts used for the catalytic combustion of diesel soot