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The experimental and modeling study on a new process of iron/cobalt alloy production using indirect reducing agent of glycerol under microwave heating
Chemical Engineering and Processing: Process Intensification  (IF4.237),  Pub Date : 2021-12-16, DOI: 10.1016/j.cep.2021.108765
K. Shojae, B. Khoshandam

Glycerol as an indirect reducing agent was used for the reduction of Iron oxide/Cobalt oxide (FeOx/CoO1-x) compounds. The effect of FeO amount on the morphology and conversion rate of obtained alloys was investigated. In addition, the system was modeled to investigate the increasing trend of the bed temperature along with samples, which were in the form of semispherical granules. The samples and products were characterized by XRD, TEM, EDX-MAP, and FESEM, analysis. The results proved that more amount of FeO in the sample led to higher conversion rate due to thermodynamic reasons. It was found that the gaseous products from pyrolysis reaction of 7 cc glycerol at 850 °C reduced (FeO)0.8 /(CoO)0.2 granule to Fe/Co alloy with a conversation rate equal to around 92%. Moreover, the system was modeled to evaluate the increasing trend of the bed temperature. The predicted temperature increasing trend of the sample and the bed had a good agreement with experimental data. In the suggested reactor, two processes of pyrolysis and reduction reactions were done, simultaneously, and the process of producing alloys was very short (6 min at 850 °C). The suggested system was very safe because the bed received all the electromagnetic waves and converted them to heat. This system can be highly considered by the alloy industry.