MEASURING THE KINETICS OF THE REDUCTION OF IRON OXIDE WITH CARBON MONOXIDE IN A FLUIDIZED BED

摘要

Combusting a solid fuel in the presence of a metal oxide rather than air, chemical looping combustion, generates CO2 suitable for sequestration and the reduced metal. For the case of iron, the reduced oxide can be re-oxidized with steam to produce high-purity hydrogen. The reduction reactions of iron oxide in carbon monoxide and carbon dioxide mixtures were investigated in a fluidized bed. Activation energies and pre-exponential factors for the reactions (i) 3 Fe2O3 + CO →← 2 Fe3O4 + CO2 and →← (ii)0.947 Fe3O4 + 0.788 CO →← 3 Fe_(0.947)O + 0.788 CO2 →← were determined. The reaction order was verified to be unity, and the change in rate with conversion was examined.