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西北地区侏罗纪煤显微组分结构的Micro-FTIR研究

Micro-FTIR Study on Structure of Macerals from Jurassic Coals in Northwestern China

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【作者】 常海洲曾凡桂李文英李军贾建波谢克昌

【Author】 CHANG Hai-zhou1, 2, ZENG Fan-gui1, LI Wen-ying1, LI Jun1, 2, JIA Jian-bo1, XIE Ke-chang11. Key Laboratory of Coal Science and Technology for Ministry of Education and Shanxi Province, Research Group for PhysicalChemistryof Minerals and Environmental Geochemistry, Department of Earth Science and Engineering, TaiyuanUniversity of Technology, Taiyuan 030024, China2. College of Chemistry and Chemical Engineering, Jinzhong College, Jinzhong 030600, China

【机构】 太原理工大学煤科学与技术教育部及山西省重点实验室 地球科学与工程系矿物物理化学与环境地球化学研究室太原理工大学煤科学与技术教育部及山西省重点实验室地球科学与工程系矿物物理化学与环境地球化学研究室山西太原030024 晋中学院化学化工学院山西晋中030600山西太原030024

【摘要】 我国西北地区侏罗纪煤资源丰富,揭示该地区煤显微组分的微观化学结构特征是对其进行合理高效利用的必要前提。采用透射式显微傅里叶红外光谱技术(Micro-FTIR)对西北地区侏罗纪煤中主要显微组分——镜质体、丝质体、半丝质体的分子结构特征进行了分析。结果表明,相对于丝质体,镜质体和半丝质体的脂肪氢相对含量较高,而芳香氢、CO相对含量较低,半丝质体的脂肪氢相对含量高于丝质体的这一分子结构特点是导致西北地区侏罗纪煤虽富含惰质组却具有较高反应性的一个重要原因;相对于强还原型煤,弱还原型煤镜质体、半丝质体和丝质体皆具有较低的脂肪氢相对含量及较高的CO相对含量,成煤过程中不同强度的氧化作用是造成煤具有不同还原类型的原因之一。

【Abstract】 Jurassic coal in Northwest China is rich in resources and it is a necessary premise to reveal the chemical structure characteristics of the coal macerals in this region before the coal is put into reasonable and efficient use. Micro-FTIR technique was used to investigate the chemical composition and structures of vitrinite semifusinite and fusinite from Jurassic coal in Northwestern China. The results show that vitrinite and semifusinite have more aliphatic hydrogen, but fusinite has more aromatic hydrogen and CO structure. The aliphatic hydrogen in semifusinite is higher than that in fusinite and it is this structure characteristic of semifusinite that led to the richer inertinite but higher reactivity of the Northwestern China coal. Not only vitrinite but also semifusinite and fusinite with weaker reducibility have less aliphatic hydrogen and more CO structures than those with stronger reducibility. The different intensity of oxidation in the process of coalification is one of the causes that led to different type of reducibility.

【基金】 国家自然科学基金项目(90410018,40772097,40572094);教育部创新团队发展计划项目(IRT0517);教育部新世纪优秀人才支持计划项目(NCET-05-0267)资助
  • 【文献出处】 光谱学与光谱分析 ,Spectroscopy and Spectral Analysis , 编辑部邮箱 ,2008年07期
  • 【分类号】P618.11
  • 【被引频次】17
  • 【下载频次】532
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