Synthesis and characterization of bimetallic Fe/Mn oxides for chemical looping combustion

Arnold Lambert (1) , Céline Delquié (2) , Isabelle Clémeneçon (1) , Elodie Comte (1) , Véronique Lefebvre (1) , Jacques Rousseau (1) , Bernard Durand (2)

1 IFPEN - IFP Energies nouvelles
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

Fe-Mn mixed oxides have been prepared by different routes, characterized, and tested with TGA for application as oxygen carriers in the CLC process. These mixed oxides exhibit a lower oxygen transfer capacity than Ni based materials which is also dependant on synthesis method. In-situ XRD analysis was performed with one sample and allowed to clearly demonstrate the reaction pathway, reduction and oxidation reactions occurring stepwise, with little phase coexistence. SEM-EDS analysis on reduced and re-oxidized samples show atom migration occurs on a rather long distance, forming Fe0 and MnO particles during reduction which are oxidized back to (Fe,Mn)2O3.

Mots clés: Chemical looping combustion; CLC; CO2 capture; Iron; Manganese; Mixed oxides

Domaines: Matériaux; Chimie inorganique

Arnold Lambert, Céline Delquié, Isabelle Clémeneçon, Elodie Comte, Véronique Lefebvre, et al.. Synthesis and characterization of bimetallic Fe/Mn oxides for chemical looping combustion. Energy Procedia, 2009, 1 (1), pp.375-381. ⟨10.1016/j.egypro.2009.01.051⟩. ⟨hal-02326477⟩