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.%The chemical structures of Huolinhe lignite (HLHM) were characterized with13C 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 of13C NMR analysis. Although aromatic carbon rate existed certain deviation between FTIR and13C NMR results, FTIR analysis can still reflect the carbon skeleton structure characteristics of coal in some ways.
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