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Optimum oxidation temperature of coal bed for methane desorption in the process of CBM extraction

机译：CBM提取过程中煤层煤层的最佳氧化温度

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摘要

To explore the optimum oxidation temperature of coalbed for promoting methane desorption, this paper carried out the experiments based on the self-built coal oxidation heating system in different gaseous environments and the high-temperature and high-pressure gas adsorption instrument. Besides, the effect of methane on free radicals and surface functional groups at the optimum oxidation temperature was studied by using electron spin resonance (ESR) spectrum and Fourier transform infrared spectroscopy (FTIR). The results show that the residual methane is the lowest at the oxidation temperature of 80 degrees C, indicating that 80 degrees C is the optimum oxidation temperature for CBM extraction. At 80 degrees C, the inhibitory effect of methane on the reactivity of coal is stronger and the reactivity can also increase. At low concentration ( 25%), the inhibitory effect of methane on the oxidation reaction of aliphatic hydrocarbon is poor. And the inhibitory effect can be improved by oxidizing and heating coal to 80 degrees C. At 80 degrees C, the inhibitory effect of methane on -OH oxidation is stronger at low methane concentration. Meanwhile, the concentration range of methane inhibiting -OH oxidation can be expanded by oxidizing and heating coalbed to 80 degrees C. The inhibitory effect of methane on -COOH oxidation mainly occurs when methane concentration is high. The concentration can be lowered when coalbed is oxidized and heated to 80 degrees C. -C-O group can be formed only when methane concentration exceeds a certain value, but this initial methane concentration can be lowered when coalbed is heated up to 80 degrees C through oxidation.
机译：为了探讨煤层的最佳氧化温度，用于促进甲烷解吸，本文对不同气体环境中的自置煤氧化加热系统进行了实验，以及高温和高压气体吸附仪进行了实验。此外，通过使用电子自旋共振（ESR）光谱和傅立叶变换红外光谱（FTIR）研究了在最佳氧化温度下自由基对自由基和表面官能团的影响。结果表明，残留甲烷在80℃的氧化温度下最低，表明80℃是CBM提取的最佳氧化温度。在80℃下，甲烷对煤的反应性的抑制作用较强，反应性也可以增加。在低浓度（<25％）时，甲烷对脂族烃的氧化反应的抑制作用差。通过氧化和加热煤可以在80℃下氧化和加热至80℃，可以提高抑制作用，甲烷对氧化氧化的抑制作用在低甲烷浓度下较强。同时，甲烷抑制-OH氧化浓度范围可以通过氧化和加热煤层氧化至80℃。当甲烷浓度高时，甲烷对氧化氧化的抑制作用主要发生。当煤渣被氧化并加热至80℃时，浓度才能降低至80℃。只有当甲烷浓度超过一定值时，才能形成-CO组，但是当煤渣通过氧化加热到80℃时，可以降低该初始甲烷浓度。

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  • 来源
    《Fuel》 |2020年第15期|116625.1-116625.7|共7页
  • 作者

    Xu Qin; Yang Shengqiang; Tang Zongqing; Hu Xincheng; Song Wanxin; Cai Jiawen; Zhou Buzhuang;

  • 作者单位

    China Univ Min & Technol Key Lab Coal Methane & Fire Control Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol State Key Lab Coal Resources & Safety Min Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Safety Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Methane & Fire Control Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol State Key Lab Coal Resources & Safety Min Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Safety Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Methane & Fire Control Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol State Key Lab Coal Resources & Safety Min Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Safety Engn Xuzhou 221116 Jiangsu Peoples R China;

    Univ Alberta Dept Civil & Environm Engn Edmonton AB T6G 2W2 Canada;

    China Univ Min & Technol Key Lab Coal Methane & Fire Control Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol State Key Lab Coal Resources & Safety Min Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Safety Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Methane & Fire Control Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol State Key Lab Coal Resources & Safety Min Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Safety Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Methane & Fire Control Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol State Key Lab Coal Resources & Safety Min Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Safety Engn Xuzhou 221116 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Coalbed methane; Coal oxidation reaction; Reaction activity; Free radical concentration; Aliphatic hydrocarbon; Oxygen-containing functional group;

    机译：煤层甲烷;煤氧化反应;反应活性;自由基浓度;脂族烃;含氧官能团;

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