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

Abstract

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.

Perovskites as Substitutes of Noble Metals for Heterogeneous Catalysis: Dream or Reality

“…Microwave-assisted regeneration of the catalytic filter has been proposed to accelerate soot combustion. This way was explored by Zhang-Steenwinkel et al 487 for regeneration of a La 0.8 Ce 0.2 MnO 3 perovskite-coated ceramic monolith. With an incident power of 200 W, maximum conversion toward CO 2 was reached after 2.5 min at 650 °C.…”

“Hot Spot” Hydrocarbon Oxidation Catalysed by Doped Perovskites—Towards Cleaner Diesel Power

“…Ciambelli et al used perovskites as methane combustion catalysts,16 and also applied mw irradiation to regenerate ceramic foam soot traps 17. Recently, our group showed that La 0.8 Ce 0.2 MnO 3 can catalyse the selective combustion of methane, CO and synthetic soot to give CO 2 using mw irradiation 18–20. Our success with mixed ceria catalysts21 prompted us to search for a mixed perovskite that would combine a high tolerance for SO 2 poisoning, a high activity in the simultaneous oxidation of both hydrocarbons and CO to give only CO 2 , and a high mw susceptibility.…”

Microwave improvement of catalyst performance in soot oxidation without additives

“…Therefore, a trade-off between maximum regeneration efficiency and prolonged filter life has to be found. Towards this aim, few attempts combine microwave heating with catalysis in the regeneration of diesel soot-filters [7][8][9]. A key parameter to achieve high regeneration efficiency is the choice of the catalyst with both, specific activity towards soot oxidation and good microwave absorption properties [10,11].…”