| O2/CO2气氛下多种碳基随机孔模型的建立 |
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| 引用本文： | 曲践,李保卫,郑坤灿,武文斐.O2/CO2气氛下多种碳基随机孔模型的建立[J].化工学报,2016,67(10):4468-4476. |
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| 作者姓名： | 曲践 李保卫 郑坤灿 武文斐 |
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| 作者单位： | 1.内蒙古自治区白云鄂博矿多金属资源综合利用国家重点实验室, 内蒙古 包头 014010;2.内蒙古科技大学能源与环境学院, 内蒙古 包头 014010 |
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| 基金项目： | 内蒙古应用技术研发与开发基金资助项目（20130310）；内蒙古高校创新团队研究计划资助项目（NMGIRT1406）。 |
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| 摘 要： | 传统随机孔模型基于简单一步反应建立，不适用于处理O2/CO2气氛下焦炭颗粒复杂气固反应。针对此问题，基于焦炭本身具有多种碳基的特点，以及焦炭颗粒在O2/CO2气氛下燃烧的特性，建立复杂气固反应下的多种碳基随机孔模型和孔隙结构模型。模拟直径为100 μm的焦炭颗粒在O2/CO2气氛下燃烧的过程，使用FORTRAN语言自主编程计算并分析结果。研究表明，燃烧初期颗粒呈现竞争效应，孔隙内部气体浓度产生剧烈波动。波动的生成原因是化学反应与物理扩散之间的竞争，可以通过增加环境氧浓度和减小焦炭颗粒粒径来改善。所提出的多种碳基随机孔模型对于表征O2/CO2气氛下焦炭颗粒的燃烧特性有着良好的适应性。
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| 关 键 词： | O2/CO2气氛 多孔介质 随机孔模型 单颗粒焦炭燃烧 传质 介尺度 数值模拟 |
| 收稿时间： | 2016-04-22 |
| 修稿时间： | 2016-06-06 |
Establishment of various char-RPM under O2/CO2 atmosphere |
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| QU Jian,LI Baowei,ZHENG Kuncan,WU Wenfei.Establishment of various char-RPM under O2/CO2 atmosphere[J].Journal of Chemical Industry and Engineering(China),2016,67(10):4468-4476. |
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| Authors: | QU Jian LI Baowei ZHENG Kuncan WU Wenfei |
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| Affiliation: | 1.Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, China;2.School of Environment & Energy, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, China |
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| Abstract: | The traditional random pore model is based on a simple one step reaction, which is not suitable to describe the complex gas-solid reaction of coke particles in O2/CO2 atmosphere. Based on the various carbons in coke and the characteristics of single char combustion in O2/CO2 atmosphere, the various char-RPM and the model of pore structure under the complex gas-solid reaction were established. The combustion process of char particles with a diameter of 100 μm in O2/CO2 atmosphere was simulated, and the results were calculated and analyzed by FORTRAN. The research showed that the particles in the early stage of combustion had a competitive effect and the gas concentration in the pore was fluctuated. The reason for fluctuation was the competition between chemical reaction and physical diffusion, which can be improved by increasing the O2 concentration or decreasing the particle size. The various char-RPM proposed in this work had a good adaptability to characterizing the combustion characteristics of char particles in O2/CO2 atmosphere. |
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| Keywords: | O2/CO2 atmosphere porous media random pore model single particle char combustion mass transfer mesoscale numerical simulation |
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