Catalytic Combustion of Methane Soot

Ciambelli, Paolo; D’Amore, Matteo; Palma, Vincenzo; Vaccaro, Salvatore

doi:10.1080/00102209608935587

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…A density of 1800 kg m -3 was used to calculate the surface specific rate from the particle diameter decrease rate. Prior work is from the following sources: NSC (ref ), WSC (ref ), LTB and LTB model (ref a), FJ (ref b), Smith (ref ), Park (ref a), Miyamoto (ref a), and Gilot (ref ). …”

Section: Results and Analysismentioning

confidence: 99%

“…More recent work has used various manufactured carbon blacks as soot models and employed a variety of techniques including shock tubes, thermogravimetric analysis, , and immobilized beds . Studies using real laboratory-generated flame or diesel soot have been confined to techniques that rely on collecting and immobilizing the soot, , or light scattering or absorption within a flame environment …”

Section: Introductionmentioning

confidence: 99%

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Size-Selected Nanoparticle Chemistry: Kinetics of Soot Oxidation

et al. 2001

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A new experimental method has been developed to conduct surface chemistry and extract surface kinetic rates on size-selected nanoparticles. The method utilizes a tandem differential mobility analyzer (TDMA) technique in which monodisperse particles are selected from a polydisperse aerosol input stream and then subjected to chemical processing. The change in particle size is measured and used to determine kinetic information for the relevant surface reaction. The method has been applied to measure the oxidation rate of soot in air over the temperature range 800-1120°C. Soot was generated in situ using an ethylene diffusion flame and sent to a differential mobility analyzer (DMA) to extract monodisperse particles. Three initial particle sizes of 40, 93, and 130 nm mobility diameter were subjected to oxidation in a high-temperature flow reactor, and the resulting change in particle size was measured with a second DMA. The measured size decreases were fit to a model utilizing a modified Arrhenius expression for the rate of decrease: Ḋ p ) -A nm T 1/2 exp(-E a /(RT)). The fit yielded an activation energy of E a ) 164 kJ mol -1 with a different preexponential factor, A nm , for each initial particle size. The size-decrease rates, and therefore the preexponential factors, differed by a factor of 1.7 between the 40 and 130 nm particles, with the 130 nm particles decreasing faster than the 40 or 93 nm particles. This may be the result of several factors including different effective densities or different soot particle compositions. The current experiments are the first measurements of the soot oxidation rate to be performed on size-selected, freshly generated soot particles using online aerosol techniques. Our results agree well with previous work over the temperature range covered, which is somewhat surprising given the wide range of techniques and materials previously studied in the effort to understand soot oxidation.

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Section: Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size-Selected Nanoparticle Chemistry: Kinetics of Soot Oxidation

et al. 2001

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“…Although there have been many published studies on soot oxidation, relatively few have used real laboratory‐generated flame or diesel soot , and we have found none that studied smoke produced by burning polymeric material. The incorporation of kinetic parameters derived from common materials should improve the usefulness of models to predict burn patterns because the carbon structure and the presence of impurities have been found to significantly affect the reactivity of soot .…”

Section: Introductionmentioning

confidence: 99%

“…The incorporation of kinetic parameters derived from common materials should improve the usefulness of *Correspondence to: C. L. Beyler, Hughes Associates, Inc., 3610 Commerce Drive, Suite 817, Baltimore, MD 21227, USA. models to predict burn patterns because the carbon structure and the presence of impurities have been found to significantly affect the reactivity of soot [6].…”

Section: Introductionmentioning

confidence: 99%

Smoke oxidation kinetics for application to prediction of clean burn patterns

et al. 2011

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SUMMARY Smoke deposition patterns are a potentially rich source of information concerning the behavior of a fire. Clean burn patterns are smoke‐free areas where smoke deposits have been oxidized away. In order to predict the formation of clean burn patterns, smoke oxidation kinetics are required. Smoke oxidation kinetics were studied for smokes from acrylonitrile butadiene styrene, polymethylmethacrylate, polypropylene, and gasoline. The fuels were burned below a hood, and smoke samples were collected from the hot gas layer and from the wall surfaces. The smokes from various polymers and gasoline were found to contain no measurable volatile organic chemicals. The kinetics of the smokes from the polymers and gasoline were found to be satisfactorily modeled as first order in both smoke and oxygen with the same kinetic constants for all fuels tested. The activation energy was calculated to be 211 kJ/mol, and the pre‐exponential factor was found to be 4.7 × 1010/s. These kinetic parameters provide a basis for modeling clean burn pattern generation. Copyright © 2011 John Wiley & Sons, Ltd.

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“…The major drawback, however, is that pollution emitted by Diesel engines, particularly in the form of soot particulate matter, is of increasing health concern [1][2][3]. For this reason, European soot emission standards will be tightened in the coming 5 years [4].…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Regeneration of a Perovskite Coated Ceramic Monolith Soot-Trap

Zhang-Steenwinkel

Zande

Castricum

et al. 2004

Topics in Catalysis

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Microwave-assisted regeneration of a perovskite coated ceramic monolith soot-trap Zhang, Y.; van der Zande, L.M.; Castricum, H.L.; Bliek, A.; van den Brink, R.W.; Elzinga, G.D. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. ABSTRACTRegeneration of a La 0.8 Ce 0.2 MnO 3 perovskite coated ceramic monolith as a model soot filter, using carbon as model soot, has been performed in a travelling wave once-through microwave system. Thus, imitation of soot filter regeneration for diesel engines is attempted by carbon burn-off on a monolithic filter coated either with both perovskite and synthetic carbon or with carbon only. The results show that, in the presence of the perovskite, complete burn-off of carbon may occur. The energy consumption for regeneration is low, as compared to non-catalytic soot filter regeneration under the same reaction conditions. This work shows the viability of dielectrically sensitive oxidative catalytic coating materials for the proposed application.

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Catalytic Combustion of Methane Soot

Cited by 8 publications

References 23 publications

Size-Selected Nanoparticle Chemistry: Kinetics of Soot Oxidation

Size-Selected Nanoparticle Chemistry: Kinetics of Soot Oxidation

Smoke oxidation kinetics for application to prediction of clean burn patterns

Microwave-Assisted Regeneration of a Perovskite Coated Ceramic Monolith Soot-Trap

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