摘要
用￣１Ｈ－ＮＭＲ结合元素分析和分子量测定等方法，对抚顺老虎台气煤吡啶抽提残煤的热解加氢产物进行了表征。结果表明：各组分具有氢化芳环和杂环化合物的开链结构。求得了各组分的平均分子结构中含有的芳香环数和平均取代度。这些结果对于推断原始煤的大分子结构具有参考价值。
The average molecular structure of aromatic fractions in asphaltene and pre-asphaltene from PI pyrolysis-hydrogenated products of Fushun Laohutai gas coal can becharacterized by ￣1H-NMR combined with elemental analysis , and VPO molecular weightdeterminations,It is shown that these fractions, which totally amount to over 70%of hydro-genated products,contain small aromatic units held together by methylene,heteroatom andbiphenyl linkages; Aromatic rings per average molecule and the degree of alkyl,naphthenicand phenolic substituents of each fraction have been determined.Several fractions of asphal-tene contain 8～11 aromatic rings per average molecule,acidic and basic fractions of asphal-tene 3～6 rings , while neutral fractions of pre-asphaltene contain 7～18 rings,acidic andbasic fractions of pre- asphaltene over 4 aromatic rings. The degree of alkyl, naphthenic andphenolic substituents bonding to available aromatic clusters is about 30%in asphaltene andabout 10%in pre-asphaltene respectively;the average alkyl substituent chains in most frac-tions contain 1～3 carbons,All results from this study provide the valuable information forunderstanding the macromolecular structure of original coals.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1995年第2期205-213,共9页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
