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首页> 外文期刊>Fuel >Differentiated evolution of coal macromolecules in localized igneous intrusion zone: A case study of Zhuxianzhuang colliery, Huaibei coalfield, China
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Differentiated evolution of coal macromolecules in localized igneous intrusion zone: A case study of Zhuxianzhuang colliery, Huaibei coalfield, China

机译：局部发火机入侵区煤大分子的差异化演化 - 以朱义煤田朱义庄煤矿案例研究

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摘要

In-depth understanding of coal macromolecular evolution in intrusion zones provides cleaning utilization and safe production of coal with useful information and theoretical basis. Nine coal samples with diverse distances to localized igneous intrusion were collected to investigate thermal evolution characteristics and mechanisms of molecular structures utilizing Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The conclusions could be summarized based on the comparative analysis of curve fitting results: Three subdivided zones III, II and I (distance to igneous intrusion decreases from zone III to I) are clarified mainly according to the differentiated thermal evolution of coal molecular structures. The advanced effects on the macromolecules induced from the igneous intrusion was weaker for the zone III than for the zones II and I. However, the zone III has higher rates for adsorption healing of structural defects than zone II and these structural defects are healed with NO and CO gases dissociated from functional groups. In zone II, aromatic clusters are polymerized by dissociated aliphatic structures or through esterification and decarboxylation of oxygen functional groups. Additionally, disassociated aliphatic structures could be preferentially cyclized to form naphthene, and a small part of them are transformed into hydrocarbons. Pyridinic nitrogen is collaged to 'graphitic' nitrogen. In zone I, evolution rates of coal macromolecular structures reach the peak compared with zones III and II. Most aliphatic chains are cracked into small free hydrocarbons. Structural defects are significantly healed in hydrocarbon atmosphere with higher temperature.
机译：深入了解煤炭大分子演变的入侵区域提供了具有有用信息和理论基础的煤炭的清洁利用和安全生产。收集了九个煤的距离，局部距离的距离距离，以研究利用拉曼光谱（拉曼），傅里叶变换红外光谱（FTIR）和X射线光电子谱（XPS）的热演化特性和分子结构机制。总结了基于曲线拟合结果的比较分析：三个细分的地区III，II和I（从区域III降低的距离III至I）的比较分析主要根据煤分子结构的差异化的热演变来阐明。 III区诱导从发芽入侵诱导的大分子的高级效果比区II和I和I.然而，4区的结构缺陷的吸附愈合率高于II区，并且这些结构缺陷愈合而没有并由官能团中解离的CO气体。在区域II中，芳族簇通过解离脂族结构或通过酯化和氧官能团的脱羧和脱羧聚合。另外，可以优先环化脱离脂族结构以形成环萘，并且将它们的一小部分转化成烃。吡啶氮被拼接至“石墨”氮。在区域I中，与区域III和II相比，煤大分子结构的进化率达到峰值。大多数脂族链被破裂成小的游离碳氢化合物。在具有较高温度的烃气氛中显着愈合结构缺陷。

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  • 来源
    《Fuel》 |2019年第15期|115692.1-115692.12|共12页
  • 作者

    Liu Hewu; Jiang Bo;

  • 作者单位

    China Univ Min & Technol Key Lab Coalbed Methane Resource & Reservoir Form Minist Educ Xuzhou 221008 Jiangsu Peoples R China|China Univ Min & Technol Sch Resources & Earth Sci 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

    Coal; Igneous intrusion; Molecular evolution; Aromatic layers; Aliphatic structures; Functional groups;

    机译：煤;火侵入;分子演化;芳族层;脂肪族结构;官能团;

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