Measurement of effective diffusivity for CO-CO 2 gas mixture in hot briquetting carbon composite iron ore by Wicke-Kallenbach method

Yasuaki Ueki, Kazuaki Nitta, Ko Ichiro Ohno, Takayuki Maeda, Koki Nishioka, Masakata Shimizu

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Effective diffusivity for CO-CO 2 gas mixture in Hot Briquetting Carbon Composite Iron Ore (CCB) at a temperature range of room temperature to 673 K was measured by Wicke-Kallenbach Method. The results obtained are summarized as follows; (1) Effective diffusivity of CO-CO 2 gas mixture through CCB increased with increasing temperature and fractional reaction of CCB. The effective diffusivity for CO-CO 2 system in CCB was proportional to the 1.50 power of temperature. (2) Kundsen diffusion and surface diffusion are negligible in regard to diffusions of CO and CO 2 in CO-CO 2 gas mixture in CCB. Therefore, diffusions of CO and CO 2 in CO-CO 2 gas mixture in CCB are described by molecular diffusion.

    Original languageEnglish
    Pages (from-to)17-21
    Number of pages5
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume95
    Issue number1
    DOIs
    Publication statusPublished - 2009

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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