Geleta, Addisu (2009) The Possible Causes of Thermal Variations of Coals in Dilbi-Moye Basin. Masters thesis, Addis Ababa University.
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Abstract
The coal deposit of Dilbi-Moye Basin in southwestern Ethiopia, between 70 21' 49" - 70 24' 31" N latitude and 360 50' 21" - 360 52' 54" E longitudes was studied with regard to sedimentological, geochemical, depositional environments and possible causes of thermal variations of the basin, which have a total area of 31.94 km2. The chemical analyses of the coal samples for the proximate, calorific value and sulfur content of the coals, different graphs are plotted versus each other to depict the coalification pattern, and the possible thermal variations of the Dilbi-Moye Basin. From the analyzed coal samples result, the rank of Moye Sub-Basin coals range from sub-bituminous to high volatile A bituminous coals; whereas the Dilbi Sub-Basin coals range lignite B through high volatile B bituminous coals. The majority of the coal seams in the Moye area exhibited higher ranks due to the proximity of volcanic extrusions. There is no uniform increment of the calorific values and decreasing of the ash content or vice versa in the Dilbi-Moye coals. However, in some cases, it is observed that as the calorific value increases, the ash content also increases and vice versa, across the basin. Therefore, the possible causes of the thermal variations of the coals of the basin might be in most cases the organic matter (genesis) of the fossil fuel and/or environment of deposition and partially the inclusion of inorganic material into the coal. However, in some coal seams, the increment of the calorific value emerges from the near-by trachytic or rhyolitic sills that cooked the underlying seams to have high heating values
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry Q Science > QE Geology |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 19 Jun 2018 12:41 |
| Last Modified: | 19 Jun 2018 12:41 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/4470 |
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