Properties and structure of vitrites from coking coals of the High Silesian Coal Basin
✍ Scribed by Stefan Jasieńko; Irena Gerus-Piasecka
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 677 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0378-3820
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The examination of the structure of cokes obtained from extracts separated from preheated vitrites of coking coals by progressive and continuous extraction with chloroform was carried out. The structural ordering (interplanar spacing and crystallite dimensions) of the cokes depends on the rank of th
of hopanes and higher carbon preference index (CPI) values (in-C22 to n-C3o) show significant bacterial contributions in samples characterized by high values of tissue preservation index (TPI). The C31 a~ (22S/ 22S+22R) hopane and C29 aaa (20S/20S+20R) sterane ratios show least variation through the