Recovery of heavy oil from Nigerian Tar sands
175p
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| Format: | Abschlussarbeit |
| Sprache: | Englisch |
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Obafemi Awolowo University, Ile Ife, Nigeria
2023
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| Online-Zugang: | https://ir.oauife.edu.ng/123456789/5181 |
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| _version_ | 1810764570955874305 |
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| author | Dawodu, Olukayode Fatai |
| author_facet | Dawodu, Olukayode Fatai |
| author_sort | Dawodu, Olukayode Fatai |
| collection | DSpace |
| description | 175p |
| format | Thesis |
| id | oai:ir.oauife.edu.ng:123456789-5181 |
| institution | My University |
| language | English |
| publishDate | 2023 |
| publisher | Obafemi Awolowo University, Ile Ife, Nigeria |
| record_format | dspace |
| spelling | oai:ir.oauife.edu.ng:123456789-51812023-05-13T18:11:41Z Recovery of heavy oil from Nigerian Tar sands Dawodu, Olukayode Fatai Tar sand Heavy oil Toluene Pulverization Agglomeration Extraction Agitation Asphaltenes level 175p Solvent extraction of heavy oil from Nigerian tar sands has been investigated using toluene. Pulverization, followed by sieving of the tar sand resulted in spherical agglomeration of the tar sand particles. The agglomeration was found to beneficiate the tar sands in terms of increased percent oil content to the tune of and 13% for the rich and lean tar sands respectively. The effects of solid/liquid ratio, temperature and agitation on the extraction process were evaluated factorial experimental design. Extraction. efficiency was found to increase with increasing agitation speed and cuss transfer driving force, expressed in terms of solid/ liquid ratio, but decreased with increasing temperature. Of the three variables, the solid/liquid ratio the greatest effect on extraction efficiency. The rate of oil extraction, expressed as extractibility showed a great dependence on agitation. Twelve and thirteen fold increases creases in extractibility were obtained at solid/liquid ratios of 1/20 and 1/5 respectively for 2.8 fold increase in agitation (250 r.p.m to 700 r.p.m). The asphaltenes content of the heavy oil extracted at 50C was about 12% lower than that of the heavy oil extracted at 25°C for extraction times below 10 minutes. The implication of this reduction in asphaltenes level could be very significant in terms of the cost of upgrading the heavy oil. Stage-wise extraction gave high extraction efficiency at a low solid/liquid ratio. An efficiency of about 99 was obtained at a total, solid/liquid ratio of 2/3 w/v (43wt% solid loading) and agitation speed of 430 r.p.m in a three stage extraction. From an analysis of the power consumed and time ±or extraction, it was found that 440 r.p.m, 26 minutes and 440 r.p.m, 18 minutes could be the most economical agitation and time levels of operation at solid/liquid ratio- of 1/5 and 1/20 respectively. 2023-05-13T16:12:41Z 2023-05-13T16:12:41Z 1985 Thesis https://ir.oauife.edu.ng/123456789/5181 en application/pdf Obafemi Awolowo University, Ile Ife, Nigeria |
| spellingShingle | Tar sand Heavy oil Toluene Pulverization Agglomeration Extraction Agitation Asphaltenes level Dawodu, Olukayode Fatai Recovery of heavy oil from Nigerian Tar sands |
| title | Recovery of heavy oil from Nigerian Tar sands |
| title_full | Recovery of heavy oil from Nigerian Tar sands |
| title_fullStr | Recovery of heavy oil from Nigerian Tar sands |
| title_full_unstemmed | Recovery of heavy oil from Nigerian Tar sands |
| title_short | Recovery of heavy oil from Nigerian Tar sands |
| title_sort | recovery of heavy oil from nigerian tar sands |
| topic | Tar sand Heavy oil Toluene Pulverization Agglomeration Extraction Agitation Asphaltenes level |
| url | https://ir.oauife.edu.ng/123456789/5181 |
| work_keys_str_mv | AT dawoduolukayodefatai recoveryofheavyoilfromnigeriantarsands |