Reactivity and structural change of coal char during steam gasification

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

doi:10.1016/j.fuel.2005.05.025

Reactivity and structural change of coal char during steam gasification

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

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

119 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 language	English
Pages (from-to)	122-126
Number of pages	5
Journal	Fuel
Volume	85
Issue number	2
DOIs	https://doi.org/10.1016/j.fuel.2005.05.025
Publication status	Published - 2006 Jan

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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10.1016/j.fuel.2005.05.025

Cite this

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title = "Reactivity and structural change of coal char during steam gasification",

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.",

keywords = "Carbonaceous structure, Coal char gasification, Microscopic observation",

author = "Yasushi Sekine and Kiyohiro Ishikawa and Eiichi Kikuchi and Masahiko Matsukata and Akemitsu Akimoto",

note = "Funding Information: This study was financially supported by BRAIN-C (CCUJ/NEDO).",

year = "2006",

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doi = "10.1016/j.fuel.2005.05.025",

language = "English",

volume = "85",

pages = "122--126",

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TY - JOUR

T1 - Reactivity and structural change of coal char during steam gasification

AU - Sekine, Yasushi

AU - Ishikawa, Kiyohiro

AU - Kikuchi, Eiichi

AU - Matsukata, Masahiko

AU - Akimoto, Akemitsu

N1 - Funding Information: This study was financially supported by BRAIN-C (CCUJ/NEDO).

PY - 2006/1

Y1 - 2006/1

N2 - 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.

AB - 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.

KW - Carbonaceous structure

KW - Coal char gasification

KW - Microscopic observation

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DO - 10.1016/j.fuel.2005.05.025

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VL - 85

SP - 122

EP - 126

JO - Fuel

JF - Fuel

IS - 2

ER -

Reactivity and structural change of coal char during steam gasification

Abstract

Keywords

ASJC Scopus subject areas

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