Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils
The presence of corrosive sulfur and polychlorinated biphenyls (PCBs) in mineral insulating oils poses significant challenge to the reliability of power transformers and presents serious environmental risks. Elemental sulfur (S8) and dibenzyl disulfide (DBDS) are well-known for causing the formation...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11082125/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849714768907075584 |
|---|---|
| author | Dejan M. Kolarski Jelena M. Lukic Jelena U. Jankovic Sandra B. Glisic Aleksandar M. Orlovic |
| author_facet | Dejan M. Kolarski Jelena M. Lukic Jelena U. Jankovic Sandra B. Glisic Aleksandar M. Orlovic |
| author_sort | Dejan M. Kolarski |
| collection | DOAJ |
| description | The presence of corrosive sulfur and polychlorinated biphenyls (PCBs) in mineral insulating oils poses significant challenge to the reliability of power transformers and presents serious environmental risks. Elemental sulfur (S8) and dibenzyl disulfide (DBDS) are well-known for causing the formation of metal sulfides on transformer components, leading to equipment failures, while PCBs present in insulating oils are persistent environmental pollutants with long-term health hazards. Current insulating oil purification techniques, including adsorbents, metal passivators and reagents, exhibit limited effectiveness, particularly if elemental sulfur is present in oil. This study introduces a novel reagent-based desulfurization process which uses copper deposited on iron particles dispersed in polyethylene glycol, for the complete removal of S8 from mineral insulating oil. The integration of S8 removal process with the KOH/PEG complex enables the simultaneous removal of S8, DBDS, and PCBs, with no residual metal particles detected in the oil following the treatment. Laboratory-scale experiments have shown the high efficiency of the developed process resulting in the improved physical-chemical and electrical properties of the oil, which was further verified on pilot scale unit and finally on the industrial scale process unit. |
| format | Article |
| id | doaj-art-d8a270b6c6f14193ad9e4ae30d2f1ae2 |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-d8a270b6c6f14193ad9e4ae30d2f1ae22025-08-20T03:13:36ZengIEEEIEEE Access2169-35362025-01-011312678012678810.1109/ACCESS.2025.358917111082125Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating OilsDejan M. Kolarski0https://orcid.org/0000-0001-8723-7788Jelena M. Lukic1Jelena U. Jankovic2https://orcid.org/0000-0001-5820-5736Sandra B. Glisic3https://orcid.org/0000-0002-0209-2258Aleksandar M. Orlovic4Nikola Tesla Electrical Engineering Institute, Belgrade, SerbiaNikola Tesla Electrical Engineering Institute, Belgrade, SerbiaNikola Tesla Electrical Engineering Institute, Belgrade, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Belgrade, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Belgrade, SerbiaThe presence of corrosive sulfur and polychlorinated biphenyls (PCBs) in mineral insulating oils poses significant challenge to the reliability of power transformers and presents serious environmental risks. Elemental sulfur (S8) and dibenzyl disulfide (DBDS) are well-known for causing the formation of metal sulfides on transformer components, leading to equipment failures, while PCBs present in insulating oils are persistent environmental pollutants with long-term health hazards. Current insulating oil purification techniques, including adsorbents, metal passivators and reagents, exhibit limited effectiveness, particularly if elemental sulfur is present in oil. This study introduces a novel reagent-based desulfurization process which uses copper deposited on iron particles dispersed in polyethylene glycol, for the complete removal of S8 from mineral insulating oil. The integration of S8 removal process with the KOH/PEG complex enables the simultaneous removal of S8, DBDS, and PCBs, with no residual metal particles detected in the oil following the treatment. Laboratory-scale experiments have shown the high efficiency of the developed process resulting in the improved physical-chemical and electrical properties of the oil, which was further verified on pilot scale unit and finally on the industrial scale process unit.https://ieeexplore.ieee.org/document/11082125/Corrosive sulfurdesulfurizationelemental sulfurinsulating oilpower transformersindustrial test run |
| spellingShingle | Dejan M. Kolarski Jelena M. Lukic Jelena U. Jankovic Sandra B. Glisic Aleksandar M. Orlovic Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils IEEE Access Corrosive sulfur desulfurization elemental sulfur insulating oil power transformers industrial test run |
| title | Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils |
| title_full | Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils |
| title_fullStr | Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils |
| title_full_unstemmed | Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils |
| title_short | Process for Simultaneous Removal of S<sub>8</sub>, DBDS, and PCBs From Mineral Insulating Oils |
| title_sort | process for simultaneous removal of s sub 8 sub dbds and pcbs from mineral insulating oils |
| topic | Corrosive sulfur desulfurization elemental sulfur insulating oil power transformers industrial test run |
| url | https://ieeexplore.ieee.org/document/11082125/ |
| work_keys_str_mv | AT dejanmkolarski processforsimultaneousremovalofssub8subdbdsandpcbsfrommineralinsulatingoils AT jelenamlukic processforsimultaneousremovalofssub8subdbdsandpcbsfrommineralinsulatingoils AT jelenaujankovic processforsimultaneousremovalofssub8subdbdsandpcbsfrommineralinsulatingoils AT sandrabglisic processforsimultaneousremovalofssub8subdbdsandpcbsfrommineralinsulatingoils AT aleksandarmorlovic processforsimultaneousremovalofssub8subdbdsandpcbsfrommineralinsulatingoils |