Reactivity and structural change of coal char during steam gasification

被引：106

作者：

Sekine, Y ^{[1
]}

Ishikawa, K ^{[1
]}

Kikuchi, E ^{[1
]}

Matsukata, M ^{[1
]}

Akimoto, A ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Chem, Tokyo 1698555, Japan

来源：

FUEL | 2006年 / 85卷 / 02期

关键词：

coal char gasification; carbonaceous structure; microscopic observation;

D O I：

10.1016/j.fuel.2005.05.025

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：122 / 126

页数：5

共 20 条

[1] Influence of pyrolysis temperature on char optical texture and reactivity [J].