Abstract
This work investigated the decomposition efficiency of SO 2 with oxygen-deficient magnetite. The natural magnetite was grinded with wet ball-milling method to prepare sub-micrometer size magnetite powder. The powder was characterized by SEM and XRD. Oxygen-deficient Ferrite Fe 3 O 4-δ was reduced from natural magnetite in the CO gas flow. The activity of decomposing SO 2 with Fe 3 O 4-δ was tested by measuring the pressure variation of the SO 2 system. The results showed that the activity of decomposing SO 2 by oxygen-deficient magnetite appeared as a single peak in the range of input CO flow rate. Under the experimental parameters: the temperature of 673K, CO flow rate of 40ml/min and the reducing time of 6 hours, the CO reduced magnetite showed the best efficiency of decomposing SO 2 , that is, 1.414×10−3mol (SO 2 )/g (Fe 3 O 4-ゴ ). New material (FeS 2 ) appeared in the Fe 3 O 4-δ powder during the decomposition process.
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