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M, a particular industrial waste, was selected to detoxify chromium slag at a high temperature. The carbon remaining in M reduced Cr (Ⅵ) of Na_2CrO_4 borne in the chromium slag to Cr (Ⅲ) in the solid phase reaction, and its thermodynamics and kinetics were studied. The reduction process of Na_2CrO_4 by carbon produced CO, which was endothermic. Under the experimental condition, the apparent activation energy was 4.41 kJ·mol~ -1 , the apparent order of reaction for Na_2CrO_4 was equal to one, and the partial pressure of CO was only 0.22 Pa at 1 330 ℃.
M, a particular industrial waste, was selected to detoxify chromium slag at a high temperature. The carbon remaining in M reduced Cr (Ⅵ) of Na_2CrO_4 borne in the chromium slag to Cr (III) in the solid phase reaction, and its thermodynamics and kinetics were studied. The reduction process of Na_2CrO_4 by carbon produced CO, which was endothermic. Under the experimental condition, the apparent activation energy was 4.41 kJ · mol ~ -1, the apparent order of reaction for Na_2CrO_4 was equal to one, and the partial pressure of CO was only 0.22 Pa at 1 330 ° C.