峰峰矿烟煤超临界流体抽提产物的结构分析  

STRUCTURAL ANALYSIS OF FENGFENG BITUMINOUS COAL EXTRACT OBTAINED BY SUPERCRITICAL GAS EXTRACTION

作　　者：李柏龄[1] 李英[1] 杨煌[1] 陈邦杰[1] 

机构地区：[1]中国科学院山西煤炭化学研究所,太原030001

出　　处：《燃料化学学报》1993年第2期211-218,共8页Journal of Fuel Chemistry and Technology

摘　　要：选用了峰峰矿不同变质程度的三种烟煤为原料,在20MPa,340℃条件下,以甲苯为溶剂进行超临界抽提。采用溶剂萃取和硅胶色谱法将抽出油分为F_1～F_6六个馏分,从各馏分的~1H-NMR谱图、^(13)C-NMR谱图和IR光谱图分析了它们的组成、结构;由元素分析和平均分子量数据,采用~1H-NMR谱和^(13)C-NMR谱相结合的计算方法,获得了各馏分的平均结构参数。实验结果表明:随着变质程度的不同三种烟煤的组成结构存在着差异,焦煤抽出物中的油含量较高(35.6%),瘦煤抽出物中的沥青烯含量较高(67.7%);三种烟煤中瘦煤的芳碳率最高,而肥煤比焦煤、瘦煤有较长的烷基侧链。Three samples of Feng Feng bituminous coal, fat coal, coking coal and lean coal, were investigated. Extraction was carried out in a semi-continuous installation with tolnene at 340℃ and 20MPa.The extract was separated into six fractions by solvent extraction and silicagel liguid ehromatographyo Their composition and structure were studied on the basis of ~1H-NMR,^(13)C-NMR and IR spectra. The average molecular structural parameters of subfraction were derived from ~1H and ^(13)CNMR coupled with molecular weight and elemental analysis data.Experimental results show that the composition and structure of three hituminous coal make a difference with degree of metamorphism. Tne content of oil in coking coal extract is higher than fat and leaf cola (35.6%) .The content of asphaltene in lean coal extract is higher than fat and coking coal (67.7%) .The carbon aromatieity of lean coal is the highest in three coals. The alkyl side chain of fat coal is longer than coking and lean coal.

关 键 词：烟煤 核磁共振 煤 液化 

分 类 号：TQ529[化学工程—煤化学工程]