Reactivity and structural change of coal char during steam gasification

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

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

This study is intended to clarify the relationship among the reactivity of coal char with steam, structural change in residual carbon, and ash behavior. Steam gasification of various coal chars and demineralized chars was carried out in a fixed-bed reactor. After gasification, 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 cross correlation between EDX-mapping and LRS-mapping was found to be very effective for the comprehensive evaluation of ash behavior and carbonaceous structure. As the gasification reaction proceeds, the reactivity of the char was varied; existence of Si and Al seemed to suffocate the char reactivity.

Original languageEnglish
Pages (from-to)122-126
Number of pages5
JournalFuel
Volume85
Issue number2
DOIs
Publication statusPublished - 2006 Jan 1

Keywords

  • Carbonaceous structure
  • Coal char gasification
  • Microscopic observation

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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