Kinetics of the reduction of wüstite by hydrogen and carbon monoxide for the chemical looping production of hydrogen
- Liu, Wen
- Lim, Jin Yang
- Saucedo, Marco A.
- Hayhurst, Allan N.
- Scott, Stuart A.
- Dennis, J.S.
DOIAbstract
AbstractHydrogen of very high purity can be produced via the steam-iron process, in which steam oxidises metallic Fe in 3/4Fe+H2O→1/4Fe3O4+H2. It is then advantageous to oxidise Fe3O4 in air to Fe2O3, an oxygen-carrier. This higher oxide of Fe is then reduced to regenerate metallic iron by reacting with synthesis gas, producing metallic Fe and possibly some wüstite (FexO, 0<x<1). In this three-stage process, the reduction of FexO to Fe is the slowest reaction. This paper is concerned with the kinetics of the reduction of wüstite (FexO) by reaction with CO, and, or H2. Starting with pure (99wt%) wüstite, the intrinsic kinetics of its reduction to metallic iron were measured in fluidised beds at different temperatures. The reaction was found ...
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