煤的ESR波谱研究

来源期刊：中南大学学报(自然科学版)1997年第5期

论文作者：邱冠周 刘国根 胡善亭 胡岳华

文章页码：23 - 25

关键词：煤； 电子自旋共振波谱； 自由基

Key words：coal； electron spin resonance spectrum； free radical

摘    要：利用JES—FEIXG型电子自旋共振波谱仪,系统地研究了褐煤与烟煤的ESR波谱,这些波谱可在室温下得到。褐煤与风化烟煤中存在大量稳定的自由基,从褐煤到烟煤,随着煤化作用的加强,ESR波谱的吸收峰变窄。风化使烟煤的自旋浓度明显下降,这将为判断煤是否风化提出又一定量判据,其原因可能是由于风化使煤的局部大分子遭到破坏,从而影响π电子自由基的稳定性。

Abstract: In this paper, the ESR (electron spin resonance) spectra of brown and bituminous coal have been systematically studied by means of JES-FE1XG model ESR spectrometer, and the spectra can be easily obtained at room temperature. The brown and bituminous coal contains a large amount of stable free radicals. Due to strengthening of coalification,the peak width of bituminous coal is more narrow than that of brown coal. The efflorescence reaction results in obvious decrease of spin concentrate,which will offer a quantitive standard for judging whether the coal was efflorescend. The reason may be that the structure of large molecule of coal is damaged by efflorescence reaction, resulting in the decrease of stability of π electron radicals.