Spectral Analysis of Coal Tar from Xiaohuangshan Region

Abstract

Abstract:

The composition of coal tar from the Xiaohuangshan region, Xinjiang was studied by NMR spectroscopy and IR spectrometry. Structure parameters of the tar were calculated, and used to evaluate the degree of coalification and hydrocarbon generation capacity of the crude coal. The average aromatization-carbon ratio was found to be 0.78, carbon number (N) 1.64, replace index (σ) 0.49, and condensation index (Q)0.51. It was found that there were many alkyl-side chains connecting to the condensation aromatic nuclei, whose chain length was relatively short. Structural information was yielded from normalized and integrated IR spectra with the OPUS software. The parameters obtained from the NMR and IR spectra indicated that the crude coal was in medium metamorphic grade, and belonged to humic coal containing mainly vitrinite. According to the hydrocarbon generation mechanism, the gas potentiality of the coal tar was found to be better than oil, with its gas potential carbon mainly located in the methyl units. It was concluded that the coal from the Xiaohuangshan region can be used as the raw material to producing coal gas.

Key words: NMR, IR, structure parameters, coal tar, Xiaohuangshan

CLC Number:

O657.61

MEI Yuan-Fei, ZHAO Xin, SUN Wan-Fu, TANG Jun, QIAO Ai-Xin. Spectral Analysis of Coal Tar from Xiaohuangshan Region[J]. Chinese Journal of Magnetic Resonance, 2011, 28(3): 339-348.

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