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首页> 外文期刊>Combustion Science and Technology >A Study on the Spontaneous Combustion Oxidation Properties of Unloaded Coal at Various Surrounding Rock Temperatures
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A Study on the Spontaneous Combustion Oxidation Properties of Unloaded Coal at Various Surrounding Rock Temperatures

机译：覆盖煤在各种周围岩石温度下的自燃氧化特性研究

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摘要

Based on effects of the deep surrounding rock temperature (T-sr) on the oxidation properties of mined coal, a thermodynamic experimental system for loaded coal oxidation is employed to examine the oxidation properties of readily oxidizable raw coal samples at various T(sr)s and comparatively analyze the patterns of change in the oxygen (O-2) consumption rate and the carbon monoxide (CO) concentration (C-CO) with T-sr. The infrared (IR) spectra of unloaded coal samples oxidized at various T(sr)s were separately fitted to Gaussian curves and Lorentzian curves by using the IR analysis software OMNIC. The following experimental results indicate that T-sr significantly affects the oxidation properties of the coal. The initial T-sr is higher and the rate of increase in the coal temperature is faster during the early stage of oxidation, and the coal-O-2 complex effect is higher and the rate of consumption of O-2 by coal is higher. The C-CO produced by each coal sample continuously increased as T-sr increased. The amount of CO that was produced slowly and linearly increased as T-sr increased during the early stage of oxidation, and it approximately exponentially increases as T-sr increased during the later stage of oxidation. Additionally, the amount of C-CO produced is increased with the increase in initial Tsr during the coal oxidation process. By using Fourier-transform IR (FTIR) spectroscopy, microstructural analysis of oxidized coal samples reveals that the characteristics of dynamic change in the micro-active groups (e.g. hydroxyl groups, O-containing functional groups and aromatic and aliphatic hydrocarbons) of unloaded coal samples at various T(sr)s, and it also reasonably determines the micro-mechanism of the oxidation properties of unloaded coal samples at various T(sr)s.
机译：基于深周围岩石温度（T-SR）对开采煤的氧化性能的影响，采用负载煤氧化热力学实验系统来检查各种T（SR）S的易氧化原料煤样的氧化性能并相对分析氧气（O-2）消耗率和用T-Sr的一氧化碳（CO）浓度（C-CO）的变化模式。通过使用IR分析软件OMNIC，在各种T（SR）S氧化的卸载煤样品的红外（IR）分别掺入高斯曲线和Lorentzian曲线。以下实验结果表明，T-SR显着影响煤的氧化性能。初始T-Sr较高，煤温率的增加率在氧化早期期间更快，煤o-2复杂效果较高，煤的O-2消耗率更高。随着T-Sr的增加，每个煤样的C-CO不断增加。在氧化早期阶段的T-Sr在氧化早期增加时，在氧化早期增加的CO的量，随着T-SR在氧化后期的阶段增加，它近似是指数增加的。另外，在煤氧化过程中初始TSR的增加，产生的C-Co的量增加。通过使用傅里叶变换的IR（FTIR）光谱，氧化煤样的微观结构分析表明，卸载煤样的微活性基团的动态变化的特性（例如含羟基，含羟基官能团和芳族烃类）在各种T（SR）S中，它还合理地确定卸载煤样的氧化特性在各种T（SR）S中的微机理。

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  • 来源
    《Combustion Science and Technology》 |2021年第12期|1623-1637|共15页
  • 作者

    Pan Rongkun; Tang Wentao; Wu Shuaidong; Ma Junwei; Fu Dong; Jia Hailin;

  • 作者单位

    Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China|Henan Polytech Univ Collaborat Innovat Ctr Coal Safety Prod Henan Pro Jiaozuo Henan Peoples R China;

    Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China;

    Yima Coal Ind Grp Co Ltd Sanmenxia Henan Peoples R China;

    Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China;

    Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China;

    Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China|Henan Polytech Univ Collaborat Innovat Ctr Coal Safety Prod Henan Pro Jiaozuo Henan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Deep coal; Spontaneous combustion of coal; Surrounding rock temperature; Oxidation of raw coal; Microstructure;

    机译：深煤;煤炭自燃;周围岩石温度;生煤的氧化;微观结构;
  • 入库时间 2022-08-19 03:08:42

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