Regeneration of a soot-trap ceramic foam by a single-mode microwave cavity

Palma, Vincenzo; D’Amore, Matteo; Russo, Paola; D'Arco, A; Ciambelli, Paolo

doi:10.1080/713712957

Cited by 12 publications

(9 citation statements)

References 8 publications

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“…For low carbon contents, the microwave power is insufficient to reach the required temperature for carbon burn-off, and carbon does not oxidise any further. Our findings are in line with results from Palma et al [8] for temperature-programmed soot regeneration of soot-loaded ceramic foam during microwave heating, who concluded that the discontinuation of soot oxidation is due to too low carbon contents. The carbon is not completely converted to CO 2 , as evidenced by the appearance of CO. After the microwave was switched off, 57.3 wt% carbon had been converted, as determined from the loss of weight.…”

Section: Resultssupporting

confidence: 93%

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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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Section: Resultssupporting

confidence: 93%

“…Among these techniques, a soot particle-trap filter has been considered as the best option. While a filtration efficiency of up to 90 % can be reached, an efficient way to carry out in-situ regeneration of these filter elements has not been found yet, the main challenge being the high ignition temperature of diesel soot [6][7][8].…”

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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“…The heating efficiency, and thus the maximum attainable temperature, depends directly on the amount of carbon that is present on the filter. When the microwave power used is insufficient to reach carbon light-off temperatures, the carbon conversion remains incomplete (Palma et al, 2002). For the MC filter, carbon is partially converted into CO, rather than CO 2 and the overall carbon conversion is limited to about 65 wt%.…”

Section: Filter Regenerationmentioning

confidence: 99%

Microwave-assisted in-situ regeneration of a perovskite coated diesel soot filter

Zhang-Steenwinkel

Zande

Castricum

et al. 2005

Chemical Engineering Science

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“…Alternatively, one can use soot filters, and heat the filter periodically to burn off the trapped soot and prevent engine suffocation. [6,7] However, if the new regulations are implemented, every diesel engine in the EU will need a much better soot filter. Here, microwave (mw) heating can provide an elegant solution.…”

Section: Introductionmentioning

confidence: 99%

Clean Diesel Power via Microwave Susceptible Oxidation Catalysts

2006

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The problem of soot emissions from diesel engines is introduced and the possible solution of combining doped perovskites and microwave (mw) irradiation to "clean up" diesel soot filters is outlined. Eighteen doped perovskite catalysts are synthesized and tested for propane and CO oxidation, which are taken as model components for soot. The activity, selectivity, and SO2 tolerance are compared under conventional heating and mw irradiation. By combining mw irradiation and doped perovskites, one can create "hot spots" on the catalyst, resulting in efficient and selective heating of the active site, as well as less poisoning. Sr-doped and Ce-doped manganese perovskites show the highest activity. These catalysts are also the most selective, and have a high mw susceptibility. Optimal SO2 tolerance is displayed by Cr perovskites, from which the La0.8Ca0.2CrO3 combination uniquely converts propane before CO, and therefore can be used to remove >C2 hydrocarbons from a mix with CO. Possible mechanistic scenarios are presented and discussed.

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Regeneration of a soot-trap ceramic foam by a single-mode microwave cavity

Cited by 12 publications

References 8 publications

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

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

Microwave-assisted in-situ regeneration of a perovskite coated diesel soot filter

Clean Diesel Power via Microwave Susceptible Oxidation Catalysts

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