COMPARATIVE THERMOGRAVIMETRIC STUDY OF CHLORINATIONS OF HEMATITE AND WUSTITE.

Article abstract of DOI:10.1007/BF01914568

The reactions of hematite and wustite with Cl//2, COCl//2, CO plus Cl//2 and gaseous CCl//4 were studied by thermogravimetry, X-ray diffraction and computer-assisted thermodynamic calculations. During the chlorination of hematite, only gaseous products were formed. The apparent activation energies were calculated from the isothermal TG curves. The chlorination of wustite involves the formation and transformation of a series of solid chloride products. FeCl//2(s), FeCl//3(s) and FeOCl(s) were found as intermediates during chlorination with Cl//2 or Cl//2 plus CO, while only FeCl//2(s) was detected in reactions with COCl//2 oe CCl//4. The chlorinations of the iron oxides with various agents were compared, and the differences in reactivity sequences were established.