Step response and transient isotopic labeling studies into the mechanism of CO oxidation over La0.8Ce0.2MnO3 perovskite Zhang, Y.; van der Zande, L.M.; Castricum, H.L.; Bliek, A. 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.

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A library of 19 supported metal oxides of group IIIA, IVA, and VA metals is prepared using a simple gram‐scale reactor for parallel pore impregnation. The activity, stability, and selectivity of these potential hydrogen combustion catalysts in the dehydrogenation of ethane to ethylene at 600 °C is examined over several redox cycles using gas mixtures that simulate real process conditions. Lead, indium, and thallium oxides are highly selective (>99.9%) to hydrogen combustion. Low‐loading catalysts are found to exhibit higher oxygen exchange activity. Differences between co‐fed and redox oxidative dehydrogenation are discussed.

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.

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.