Hot Strength of Coke Prepared by Briquetting and Carbonization of Lignite

  • Saito Yasuhiro
    Department of Applied Chemistry, Kyushu Institute of Technology
  • Mori Aska
    Institute for Materials Chemistry and Engineering, Kyushu University
  • Kudo Shinji
    Institute for Materials Chemistry and Engineering, Kyushu University Interdisciplinary Graduate School of Engineering Sciences, Kyushu University Transdisciplinary Research and Education Center of Green Technology, Kyushu University
  • Hayashi Jun-ichiro
    Institute for Materials Chemistry and Engineering, Kyushu University Interdisciplinary Graduate School of Engineering Sciences, Kyushu University Transdisciplinary Research and Education Center of Green Technology, Kyushu University

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Description

<p>The hot strength of coke prepared from an acid-washed lignite by briquetting-carbonization before and after CO2 gasification was, for the first time, investigated in this work. The hot strength at 1000°C before gasification was higher than coke strength measured at a room temperature. CO2 gasification resulted in a linear decrease of the hot strength with the reaction time. The lignite-coke showed faster decrease in the strength during gasification, compared to conventional cokes derived from caking coal or non-or slightly caking coal, due to the high reactivity caused by its porous structure and catalytic metal species remaining even after the acid-washing, while it showed superior hot strength at the initial stage of gasification.</p>

Journal

  • ISIJ International

    ISIJ International 62 (12), 2511-2515, 2022-12-15

    The Iron and Steel Institute of Japan

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