Combustion Characteristics and Kinetics of Partial Gasified Coal Char
Combustion Characteristics and Kinetics of Partial Gasified Coal Char
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DOI：
10.1080/00908310600626804
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发表时间：
2007-11
期刊：
影响因子：
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通讯作者：
Y. Xiang;R. Guo;H. B. Li;Y. Wang
中科院分区：
文献类型：
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作者：
Y. Xiang;R. Guo;H. B. Li;Y. Wang
对部分气化煤焦的燃烧特性和燃烧动力学进行了研究。燃烧动力学模型采用两阶段分布活化能模型(TS-DAEM)和SIMPLE模型。实验结果表明，煤种和气化程度不同，焦炭的燃烧特性也不同。模拟结果表明，TS-DAEM模型能够较好地描述PGC-半焦的燃烧过程。活化能和指前因子随PGC-半焦气化比例的增加而增加，但高活性部分的比例降低。这表明随着气化转化的进行，部分气化煤焦中的难反应部分越来越多。然而，简单的模型不能很好地描述PGC-半焦的燃烧过程，尤其是在燃烧DTG曲线上有明显第二峰的PGC-半焦。
Abstract Combustion characteristics and kinetics of partial gasified coal char (PGC-char) were investigated in this article. Two-stage distributed activation energy model (TS-DAEM) and simple model were used to model the combustion kinetics. The experimental results showed that the combustion characteristics of PGC-chars varied with coal types and percentage of gasification. Modeling results showed that TS-DAEM could suitably describe the combustion of PGC-char. The activation energy and preexponential factor increased with the increasing of PGC-char gasification percentage, but the percent of high reactivity part decreased. This indicated that the difficulty reactive part in the partial gasified coal char became more and more with the gasification conversion. However, simple model wasn't fit to describe the combustion of PGC-char, especially for PGC-chars with obvious second peak in combustion DTG curves.