摘要
应用红外光谱和电子顺磁共振对西曲煤显微组分的分子结构和自由基性质进行了研究。结果表明:镜质组、半镜质组和惰质组的芳碳率分别为0.84、0.91和0.93,镜质组分子结构单元中含有较多的脂肪取代基和螯形醌基;显微组分的自由基浓度(10^(18)spins/g):镜质组3.87,半镜质组18.98,惰质组40.10。镜质组自由基为较小的含氧型芳香π自由基,情质组自由基为巨大的纯芳香π自由基;半镜质组的分子结构和自由基性质均介于镜质组和惰质组之间。
Infrared and electron spin resonance spectrum studies on the molecular structure and free radical properties of Xiqu coal macerals have been carried out in this paper. It shows that the carbon aromaticity of vitrinite. semivitrinite and inertinite is 0.84, 0.91 and 0.93 respectively. The aliphatic substituent group and chelate quinonyl contents in the molecular structural unit of vitrinite are higher than that of semivitrinite and inertinite. The free radical concentration of the macerals of vitrinite, semivitrinite and inertinite is 3.87 × 1018spins/ g, 18.98 × 1018sphis/ g and 40.10× 1018spins/ g rsepectively, free radicals in vitrinite belong to small oxygen-bearing aromatic π types, and those in inertinite large aromatic π ones. With respect to molecular structure and free radical characteristics, semi-vitrinite mediates between vitrinite and fusinite inertinite.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
1992年第4期97-103,共7页
Journal of China University of Mining & Technology
关键词
煤
化学成分
显微结构
macerals, free radical, coal structure, infrared spectrum, electron spin resonance spectrum
