煤的ESR波谱研究

A STUDY ON ESR SPECTRUM OF COAL

利用ＪＥＳＦＥ１ＸＧ 型电子自旋共振波谱仪，系统地研究了褐煤与风化烟煤的ＥＳＲ 波谱，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。

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. The brown and bituminous coals contain 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 concentration, 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. \;