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丝质体是煤中的主要组分之一 ,其在煤中含量的多少、生烃潜力的大小、生烃特性等直接影响煤成烃资源的评价。本文采用岩石热解、热解气相色谱以及开放体系下热模拟等方法 ,对山西繁峙老第三纪 (E3)煤中丝质体的生烃潜力、烃类组成特征、成烃演化规律进行了研究 ,并与贵州水城晚二叠世 (P2 1 )含树皮体煤中的主要组分 -树皮体进行比较。结果表明 :丝质体的生烃潜力、氢指数 (2 6 .18m g/ g、35 mg/ g· TOC)远低于树皮体的生烃潜力、氢指数 (2 97mg/ g、491mg/ g· TOC) ;丝质体有两个生烃高峰 ,所对应的 VR0 (% )分别为 1.1%和 2 .0 % ;丝质体产烃范围较宽 ,从 2 0 0℃可以延续到 6 0 0℃ ,甚至超过6 0 0℃还有少量的烃类物质生成 ;丝质体的烃类组成以轻质烃为主 ,湿气次之 相似文献
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Rafal Morga 《International Journal of Coal Geology》2011,88(4):194
The study was performed on inertinite concentrates prepared from 19 samples of bituminous, mostly coking, coal (Rr = 0.87–1.42%) from the Upper Silesian Coal Basin of Poland. In all examined samples, total semifusinite differs from fusinite, in terms of mean values, by higher frequencies of the D1 and D4 band position and lower frequency of the D3 band position, higher G band FWHM, the AD3/AALL and AD4/AALL ratios (where AALL means the surface of all the Raman bands), and lower D1 band FWHM, the ID1/IG and AD1/AALL ratios. Similar differences exist between reactive and non-reactive semifusinites. The diameter of coherent domains (La) increases in the following sequence: reactive semifusinite < non-reactive semifusinite < fusinite. The AD3 + D4/AALL ratio reflects inertinite reactivity in bituminous coals, and decreases with the increase of mean reflectance (Rr) of semifusinite and fusinite. Using the AD3 + D4/AALL, ID1/IG and AD1/AALL ratios or the D3 band position it is possible to interpret thresholds dividing, in terms of mean values, total semifusinite and fusinite, coming from different coals. The results of the study suggest that the term “semifusinite” should only comprise reactive and semi-reactive components. Non-reactive semifusinite should be considered fusinite. Semifusinite from bituminous coals (of Rr ≈ 0.9–1.4%), defined in the proposed way, would be characterized by the AD3 + D4/AALL ratio ≥ 0.35, or the ID1/IG ratio ≤ 1.03. 相似文献
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