神木煤有机显微组分的结构特征与热转化性质的关系

通过手选和重液浮选分离相结合的方法，从神木煤中分离得到了纯度较高的镜质组和惰质组，并对其进行元素分析、FT-IR、13CNMR和TG/DTG等表征分析。结果表明，神木煤镜质组和惰质组的最佳分离密度为1.320 g/cm3～1.324 g/cm3和1.378 g/cm3～1.382 g/cm3，此时分离纯度分别为97.55%和96.90%。镜质组有较高的H含量，较低的芳香度0.51和数量较多的氢键；惰质组有较高的碳含量，较高的芳香度0.76，原煤的芳香度介于两者之间为0.68。FT-IR分析表明，镜质组比惰质组有较多的氢键，脂肪氢含量和较少的Har/Hal比。随温度增加，镜质组和惰质组的芳香氢含量和Har/Hal比增加，而脂肪氢含量减少。相同温度下，惰质组的Har/Hal比始终高于镜质组。TG/DTG分析表明惰质组比镜质组有较高的热稳定性，原煤的热稳定性介于两者之间，在相同的Har/Hal比时镜质组中剩余挥发分比惰质组的少，反映出惰质组的组成（较高的芳香度和较低的脂肪氢含量）对热稳定性的影响。

RELATIONSHIP BETWEEN STRUCTURE CHARACTERISTICS AND THERMAL CONVERSION PROPERTY OF SHENMU MACERAL CONCENTRATES

Vitrinite and inertinite separated from Shenmu coal using sink-float method combined with hand-picking were systematically investigated by ultimate analysis, FT-IR,13CNMR and TG/DTG. The results showed that the optimum density for separation of vitrinite and inertinite from Shenmu coal was 1.320 g/cm3～1.324 g/cm3 and 1.378 g/cm3～1.382 g/cm3 respectively. The purity of vitrinite and inertinite was 97.55% and 96.90% at this separation condition. Vitrinite had higher hydrogen content, lower aromaticity of 0.51 and a large amount of hydrogen bonds, while inertinite had higher carbon content and aromaticity of 0.76, and those of parent coal was in the middle of them with aromaticity of 0.68. The result of FTIR showed that at the same temperature vitrinite had more hydrogen bonds, higher aliphatic hydrogen content and lower Har/Hal ratio. With increasing temperature, the content of aromatic hydrogen and Har/Hal ratio all increased and the aliphatic hydrogen decreased. The result of TG/DTG showed that vitrinite had higher thermal stability than inertinite and the remaining volatile matter in vitrinite was lower than that in inertinite at the same Har/Hal ratio, which was consistent with the fact that inertinite had higher aromaticity and lower aliphatic hydrogen content and suggested that the chemical property of maceral affected its reactivity.