کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1753530 | 1522604 | 2011 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Reactivity of semifusinite and fusinite in the view of micro-Raman spectroscopy examination Reactivity of semifusinite and fusinite in the view of micro-Raman spectroscopy examination](/preview/png/1753530.png)
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.
► Inertinite reactivity related to Raman structural parameters.
► The AD3 + D4/AALL ratio, used as a reactivity measure, decreases with Rr increase.
► Division between total semifusinite and fusinite based on Raman structural parameters.
► Semifusinite should only comprise reactive and semi-reactive components.
► Semifusinite defined with the use of Raman structural parameters.
Journal: International Journal of Coal Geology - Volume 88, Issue 4, 1 December 2011, Pages 194–203