Kinetics of Microwave-Assisted Reduction of Manganese Oxide

Abstract:

The reduction rates of manganese oxide by carbon and SiC was examined by heating MnO₂-carbon and MnO₂-SiC mixtures in a 7-kW industrial microwave oven. The results show that the rate of the reduction increased with the amount of carbon in MnO₂-carbon mixture and with SiC in MnO₂-SiC mixture. The rate of the MnO₂ reduction by carbon was proportional to the reaction time, and that by SiC was proportional to 2/3 power of the reaction time. The reduction was found to be controlled by chemical reaction. The reaction rate constant of the reduction of MnO₂ k_C increased with increasing the amount of carbon in the mixtures but k_SiC decreased with increasing the amount of SiC in the mixtures.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 2286-2292
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.2286
• Online since: May 2011
• Authors: Hai Chuan Wang, Zhi You Liao, Yuan Chi Dong, Shi Jun Wang, Yun Zhou
• Keywords: Carbon, Manganese Oxide, Microwave-Assisted Heating, Reduction, Silicon Carbide (SiC)

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