燃料化学学报2016，Vol.44Issue(7)：777-783,7.
低中煤级煤结构演化的XRD表征
XRD characterization of structural evolution in low-middle rank coals
摘要
Abstract
The structural parameters including La , Lc and d002 of 28 coal samples with the maximum vitrinite reflectance Ro,max varying from 0. 30% to 2. 05% were analyzed using X-ray diffraction (XRD). The change in the XRD parameters associated with increasing vitrinite reflectance was obtained. The results indicate that, for the test coals with Ro,max less than 1. 0%, the values of La and Lc sharply increase while d002 shows a reverse trend, and the decrease of oxygen-containing functional group and the length of branching aliphatic side chains are dominated. For those with Ro,max from 1. 0% to 1. 6%, the value of La continuously increases, d002 increases first and then decreases, and Lc decreases first and then remains steady. Moreover, dehydrogenation and adjusting the space steric hindrance are simultaneous. The value of d002 continues to decrease while La and Lc increases, and the variation of coal structure is dominated by aromatization process during the Ro,max range of 1 . 6% to 2 . 0%. The variation of XRD parameters presents close relation with the first and the second coalification jump phase.关键词
低中煤级煤/XRD/结构演化Key words
low-middle rank coals/X-ray diffraction/structural evolution分类
化学化工引用本文复制引用
李霞,曾凡桂,王威,董夔..低中煤级煤结构演化的XRD表征[J].燃料化学学报,2016,44(7):777-783,7.基金项目
The project was supported by National Natural Science Foundation of China (41302127), the Joint Funds of the Coal Based and Low Carbon of Shanxi (U1510102) and Shanxi Province Coal Based Key Scientific and Technological Projects(MQ2014-01).国家自然科学基金(41302127), NSFC-山西煤基低碳联合基金(U1510102)和山西省煤基重点科技攻关项目(MQ2014-01)资助 （41302127）
