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Multifonctional reactor for benchmark evaluation of novel, flame-made nanostructured catalysts

English title Multifonctional reactor for benchmark evaluation of novel, flame-made nanostructured catalysts
Applicant Pratsinis Sotiris E.
Number 117349
Funding scheme R'EQUIP
Research institution Institut für Verfahrenstechnik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Chemical Engineering
Start/End 01.07.2007 - 30.06.2008
Approved amount 135'000.00
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Keywords (11)

Catalysis; Flame spray pyrolysis; Mixed oxides; Nanoparticles; Ceramic foams; DeNOx; automotive catalyst; ehaust gas treatment; partial oxidation; dehydrogenation; flame-made

Lay Summary (English)

Lay summary
Our current and future research targets are the characterization of a broad range of materials for use as heterogeneous catalysts with focus on environmental catalysis and chemical synthesis and will include the following topics:•Automotive catalysts (3-way catalysts, NOx-storage reduction catalysts)•Selective partial oxidations •Selective hydro- and dehydrogenation ( e.g. propane to propene)The different research projects require a modular reactor allowing to establish various reaction conditions (temperature/pressure control, reactant introduction, flow rate and gas mixing), reactor geometries for investigating various support structures (e.g. spheres, rings, honeycombs, solid foams etc.) as well as analysis configurations that must be tailored to the type of catalyst and reaction investigated. The automotive catalysts will be tested under conditions close to real car exhaust gas compositions. Specifically, the influence of CO2, H2O or other gases on catalysis will be investigated as well as catalyst poisoning by sulfur compounds and related deterioration of the catalysts. In combination with thorough structural investigations this data will lead to a better understanding of catalyst performance and subsequent improvement of catalyst preparation and composition with regard to activity, durability, poisoning resistance and regeneration potential.For partial oxidation and dehydrogenation catalysts, spray flame synthesis of vanadium oxide containing nanoparticles on selected supports (e.g. titania, alumina, zirconia, magnesia) will be performed. Systematic experiments of directly-deposited flame-made nanoparticles on foam supports (ceramic or metallic) will be done. The direct-deposition method will allow retaining the intrinsic catalytic properties of the individual particles because no subsequent treatment of the particles and carriers would be necessary as no solvent or additives are needed, in contrast to traditional wet-coating techniques. Such technology will make possible to combine particle synthesis and deposition on structured, substrates in one step resulting in ready-to-use catalysts.The research on flame-made catalyst nanoparticles aims at providing and establishing flame synthesis as a route to heterogeneous catalysts with different properties than those obtained by conventional wet-phase synthesis. The data obtained with the proposed test reactor will contribute to a better understanding regarding relations between catalytic behavior on particle properties and thus help to develop more efficient catalytic materials for synthesis of chemicals and environmental protection.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Associated projects

Number Title Start Funding scheme
114095 Dry synthesis of softly-agglomerated, metal/ceramic nanoparticles for functional nanocomposites 01.10.2006 Project funding (Div. I-III)