Reactivity and structural change of coal char during steam gasification

Yasushi Sekine, Kiyohiro Ishikawa, Eiichi Kikuchi, Masahiko Matsukata, Akemitsu Akimoto

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    This study is intended to clarify the relationship among the reactivity of coal char with steam, carbonaceous structural change, and ash behavior. Steam gasification of various coal chars and demineralized chars was carried out in a fixed-bed reactor at 1273 K. After gasification at certain conversion le vel, the reacted char was analyzed using Laser Raman Spectroscope (LRS), and Scanning Electron Microscope, Energy Dispersive X-ray Spectroscope (SEM/EDX) mapping. Results of SEM images and EDX-mappings revealed that novel parallel analysis of EDX-mapping and LRS-mapping were extremely effective for comprehensive evaluation of ash behavior and carbonaceous structure. As the gasification reaction proceeds, the reactivity of char was changed; existence of Si and Al seemed to suffocate the char reactivity from these parallel analyses.

    Original languageEnglish
    Title of host publication22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
    Pages1207-1213
    Number of pages7
    Volume2
    Publication statusPublished - 2005
    Event22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005 - Pittsburgh, PA
    Duration: 2005 Sep 122005 Sep 15

    Other

    Other22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
    CityPittsburgh, PA
    Period05/9/1205/9/15

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    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

    Cite this

    Sekine, Y., Ishikawa, K., Kikuchi, E., Matsukata, M., & Akimoto, A. (2005). Reactivity and structural change of coal char during steam gasification. In 22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005 (Vol. 2, pp. 1207-1213)