摘要
前沥青烯及沥青烯是环己酮抽出物的主要级分，它们与原煤有相近的元素组成，并且分子量较大（１３２０～１５６０），因此抽出物的组成与结构较好地反映出原煤的组成与结构。本文通过红外光谱，核磁共振的研究讨论了抽出物中前沥青烯及沥青烯级分的结构特点，并由核磁共振氢谱数据计算抽出物的平均分子结构参数，前沥青烯及沥青烯级分的芳香度分别为０．７２及０．６３。抽出物的热解行为表明，热解反应集中在２００～６００℃，主要产物为焦油，占热解产物的５０．６％。
Cyclohexanone is a new effective solvent for coal extraction which we have found recently The extracts of high extraction yield (up to 40% for Yanzhou coal) and high molecular weight (1230 for asphaltenes and 1560 for preasphaltenes) are available for investigating the coal molecular structure Preasphaltenes and asphaltenes are the main components of the extracts The structural analysis by FTIR and 1 HNMR showed that preasphaltenes, compared with asphaltenes, had a higher aromaticity (0 72 for preasphaltene and 0 63 for asphaltene) and more bridge methylene but less side alkyl The pyrolysis reaction of the extracts occured at 200￣600℃ and the main pyrolysis product of the extracts was tar
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1997年第2期135-138,共4页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
关键词
煤
溶剂抽提物
热解
环己酮
萃取
煤结构
coal, solvent extracts, FITR, 1HNMR, pyrolysis, cyclohexanone
