| 孔隙结构对焦碳燃烧影响的数值研究 |
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| 引用本文： | 梁晓宏,范维澄.孔隙结构对焦碳燃烧影响的数值研究[J].火灾科学,1999,8(1):52-57. |
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| 作者姓名： | 梁晓宏 范维澄 |
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| 作者单位： | 中国科学技术大学火灾科学国家重点实验室 |
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| 摘 要： | 煤粒在热解过程中，由于不同的加热速度和不同的热解最终温度所产生的孔隙结构也不同，本文建立了多组分并存的情况下，综合考虑化学反应，内外传递过程及颗粒孔结构变化在内的单颗粒焦碳着火燃烧模型，计算出３种不同孔隙结构焦碳的转化率，氧化反应率及比面积的变化，比较了它们之间的差异。
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| 关 键 词： | 孔隙结构 燃烧 |
| 收稿时间： | 1998/9/30 0:00:00 |
| 修稿时间： | 1998/10/6 0:00:00 |
Numerical Study of the Effect of Pore Structure on Char Oxidation |
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| LIANG Xiao-hong and FAN Wei-cheng.Numerical Study of the Effect of Pore Structure on Char Oxidation[J].Fire Safety Science,1999,8(1):52-57. |
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| Authors: | LIANG Xiao-hong and FAN Wei-cheng |
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| Institution: | University of Science and Technology of China;University of Science and Technology of China |
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| Abstract: | Abstract Chars with different pore structures can be generated from the same coals by varying pryrolysis conditions, a higher final pyrolysis temperature or a slower heating rate generate chars of more compact structure. A model is developed for the combustion of a single char particle. The intraparticle diffusion and structural changes of the particle are considered with the chemical reactions. The ingnition line, area and combustion rate of three different char particles are calculated and compared. |
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