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3. High-throughput approach to the catalytic combustion of diesel soot II: Screening of oxide-based catalysts

Author

Bou-Orm, Nadine, Iorgu, Andreea, Daniele, Stéphane, Bassou, Badr, Guilhaume, N., Iojoiu, Eduard Emil, Farrusseng, David, Lombaert, Karine, Bianchi, Daniel, Mirodatos, Claude, Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), SURFACES, Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), INGENIERIE (INGENIERIE), and AIR:SURFACES+DBI

Subjects
Diesel exhaust, Catalyst support, Inorganic chemistry, Oxide, chemistry.chemical_element, Catalytic combustion, 02 engineering and technology, 010402 general chemistry, Heterogeneous catalysis, medicine.disease_cause, complex mixtures, 01 natural sciences, Oxygen, Catalysis, chemistry.chemical_compound, medicine, ComputingMilieux_MISCELLANEOUS, Chemistry, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, [SDE.ES]Environmental Sciences/Environmental and Society, Soot, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, 0210 nano-technology
Abstract

Following the development of a high-throughput (HT) methodology for the evaluation of diesel soot oxidation catalysts in a 16 parallel channels reactor, a library of over 60 catalysts was tested under optimized conditions. The catalyst compositions were chosen to include solids which specific properties like oxygen storage capacity, oxygen mobility and ionic conductivity. The key parameters for high activity appear related to the presence of active and mobile surface oxygen species, and to an appropriate catalyst particle size in order to favour the number of contacts with the soot. In contrast, high oxygen storage capacity and bulk oxygen ion mobility do not appear as relevant properties for high catalytic activity. Nine new formulations were found to perform better than the reference catalyst “high surface area (HSA) ceria” (Rhodia).

Published
2011

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