A kinetic comparison between microwave heating and conventional heating of FeS-CaO mixture during hydrogen-reduction

Ahmadreza Amini, Ko ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo

    研究成果: Contribution to journalArticle査読

    10 被引用数 (Scopus)

    抄録

    Kinetics of iron production via hydrogen-reduction of FeS-CaO mixture during both microwave heating and conventional heating was investigated at 750, 570, and 460 °C to clarify the effect of heating method on dominant rate-controlling mechanism. Results of conventional heating revealed that the rate controlling step during treatment in the first 500 s at 750 °C, 800 s at 570 °C, and 1000 s at 460 °C is interfacial chemical reaction; then it is changed to gas diffusion in micro pores of reduced Fe owing to the formation of Fe shell on the surface of FeS particles. In microwave treatment, the interfacial chemical reaction is rapidly progressed and gas diffusion is the dominant rate-controlling mechanism with an activation energy of 22.3 kJ.mol−1. This study demonstrated that the microwave irradiation enhances the rate of chemical reaction during iron production from FeS-CaO mixture.

    本文言語英語
    ページ(範囲)648-657
    ページ数10
    ジャーナルChemical Engineering Journal
    374
    DOI
    出版ステータス出版済み - 10 15 2019

    All Science Journal Classification (ASJC) codes

    • 化学 (全般)
    • 環境化学
    • 化学工学(全般)
    • 産業および生産工学

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