CO oxidation over nonstoichiometric nickel manganite spinels

Nonstoichiometric nickel–manganese spinel oxides, NixMn3−x ▭3δ/4O4+δ (1≥x≥0), have been synthesized by calcination in air of mixed oxalates at 623 K. These materials are shown to be highly reactive for CO oxidation, some conversion being observed at room temperature for the most active solid (x=1.0). The interaction of CO and O2 with these oxides has been studied by in situ IR spectroscopy under steady-state and transient reaction conditions. A detailed mechanism is proposed wherein CO reacts with coordinatively unsaturated cations to give carbonyl complexes which in turn react with surface oxygen activated on anionic vacancies. Adsorbed and gaseous CO2 also undergo much slower side reactions with lattice oxygen or surface hydroxide groups to give more stable hydrogen carbonate and carbonates species, which lead to catalyst deactivation. Marked effects of pretreatment are explained on the basis of the observed kinetics and the proposed mechanis

Catalytic conversion of biomass: ethanol reforming and pyrolytic bio-oils co-cracking. Coupling between reactivity, diffusion and ageing for heterogeneous catalysts

SSCI-VIDE+ING+CMIInternational audienceNon

Conversion catalytique de la biomasse : cas du reformage de l’éthanol et du craquage d’huiles depyrolyse pour illustrer des couplages ‐ réactivité, diffusion et vieillissement de catalyseurs.C. Mirodatos

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Selective oxidative conversion of light hydrocarbons using catalytic modified dense ionic oxygen conducting membranes

InternationalInternational audienc

Quantitative structure descriptor relashionship (QSDR) in heterogeneous catalysis: combining formulation and microkinetic modeling in methane oxidative coupling catalyst optimization

internationalInternational audienc

Catalysis for renewable sources: fuel, energy, chemicals

SSCI-VIDE+ING+CMIInternational audienceSeptember 6, WednesdayMorning SessionChairperson – Professor Claude MirodatosPLENARY LECTURESeptember 6, Wednesday, 9.00PL-5 Dr. Jean-François JolyIFP Energies nouvelles, Lyon, FranceFUELS AND CHEMICALS PRODUCTION FROM BIOMASS: SOME SCIENTIFICCHALLENGES FOR ACCELERATING INNOVATION AND PROCESS DEVELOPMENTSeptember 6, Wednesday, 10.00BRIEFING: BIORENEWABLES IN OIL REFINERIES - PROS & CON

New trends in catalysis

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Les bio-carburants sont-ils tous durables et écologiques pour l’avenir de nos sociétés ?

SSCI-VIDE+ING+CMIInternational audienceCarburants/Biocarburants, Durables, ou peu, ou pasÉcologiques, ou peu, ou pasEconomie «zéro déchets», circulaire, recyclage, …Questions récurrentes, d’actualité, trop ou insuffisamment documentées, ..?Quelles frontières entre les domaines scientifiques, sociétaux, politiques?La société (les citoyens) peut-elle infléchir les orientations de la recherche scientifique? De quelle manière