化工学报 ›› 2017, Vol. 68 ›› Issue (11): 4272-4278.DOI: 10.11949/j.issn.0438-1157.20170330

• 能源和环境工程 • 上一篇    下一篇

霍林河褐煤化学结构特性的13C NMR与FTIR对比分析

徐芳1,2, 刘辉1, 王擎3, 刘营3   

  1. 1 哈尔滨工业大学能源科学与工程学院, 黑龙江 哈尔滨 150001;
    2 东北电力大学教务处, 吉林省 吉林市 132012;
    3 东北电力大学能源与动力工程学院, 吉林省 吉林市 132012
  • 收稿日期:2017-03-30 修回日期:2017-07-26 出版日期:2017-11-05 发布日期:2017-11-05
  • 通讯作者: 刘辉
  • 基金资助:

    国家自然科学基金项目(51476045)。

Comparison of Huolinhe lignite structural features by using 13C NMR & FTIR techniques

XU Fang1,2, LIU Hui1, WANG Qing3, LIU Ying3   

  1. 1 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;
    2 Academic Adminstration, Northeast Electric Power University, Jilin 132012, Jilin, China;
    3 School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China
  • Received:2017-03-30 Revised:2017-07-26 Online:2017-11-05 Published:2017-11-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51476045).

摘要:

采用13C NMR及FTIR对霍林河褐煤的化学结构特性进行深入分析,通过13C NMR计算得到霍林河褐煤包含34.32%的脂肪族碳、61.25%的芳香族碳以及4.43%的羰基碳。平均每个芳环团簇包含1~2个芳香环,每个芳香环中平均碳原子取代数为3~4。平均亚甲基碳链数为1.4,烷链支化度为25.47%,说明脂肪族多以短链分支形式存在。通过对霍林河褐煤红外光谱进行分峰拟合,计算得到煤的FTIR结构参数(平均亚甲基碳链数、芳香环取代度、烷链支化度)与13C NMR计算结果相吻合。虽然芳碳率(far-F=55.37%)与13C NMR计算结果存在一定的偏差,但是FTIR很大程度上仍然可以反映煤的碳骨架结构特性。

关键词: 霍林河褐煤, 13C NMR, FTIR, 对比分析

Abstract:

The chemical structures of Huolinhe lignite (HLHM) were characterized with 13C NMR & FTIR techniques. According to 13C NMR analysis, HLHM consisted of 34.32% aliphatic carbons, 61.25% aromatic carbons and 4.43% carbonyl carbons. Each aromatic cluster contained 1-2 rings on average and the number of substituents on each aromatic ring was 3-4. The length of average methylene chain was 1.4 and the branched degree of aliphatic chain was 25.47%, showing the aliphatic carbons mainly consisted in the form of short chain. Several structural parameters were obtained by calculation based on FTIR data and curve-resolved band. Structural parameters (average methylene chain length, substituted degree of aromatic ring, aliphatic chain branched degree) obtained by FTIR analysis were consistent with the results of 13C NMR analysis. Although aromatic carbon rate existed certain deviation between FTIR and 13C NMR results, FTIR analysis can still reflect the carbon skeleton structure characteristics of coal in some ways.

Key words: Huolinhe lignite, 13C NMR, FTIR, comparison analysis

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