Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin
Oil/paper insulation degradation in transformers involves chemical and physical changes in the materials. Some of the chemical reactions involve very reactive intermediates called free radicals. Free radicals play a major role in a wide variety of ageing processes. The detection of these reactive sp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-07-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/8/8/7690 |
| _version_ | 1811184711230291968 |
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| author | Issouf Fofana John Sabau Amidou Betie |
| author_facet | Issouf Fofana John Sabau Amidou Betie |
| author_sort | Issouf Fofana |
| collection | DOAJ |
| description | Oil/paper insulation degradation in transformers involves chemical and physical changes in the materials. Some of the chemical reactions involve very reactive intermediates called free radicals. Free radicals play a major role in a wide variety of ageing processes. The detection of these reactive species in oil may, in principle, provide useful information for monitoring oil degradation. This manuscript details a laboratory technique, which determines the relative content of free radicals in insulating oils of petroleum origin by a spectrophotometric method. Free radicals may be formed in oils under operating or test conditions. The procedure enables the determination of the relative concentration of free radicals, which can act as the precursors of decay products such as charge carriers, oxidized molecules, as well as polymerization products. The technique involves using a reactive free radical reagent, 2,2-diphenyl-1-picrylhydrazyl (DPPH), added to oil to assess free radical concentration. This method is applicable to new, reclaimed, or used oils as well as naturally or artificially oxidized oil (the cause of aging can be chemical, physical, or electrical). In this contribution, free radicals were assessed following electrical discharge application in oil. |
| first_indexed | 2024-04-11T13:18:04Z |
| format | Article |
| id | doaj.art-6985ccf456e54e75a399d89dbd9b37e7 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T13:18:04Z |
| publishDate | 2015-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-6985ccf456e54e75a399d89dbd9b37e72022-12-22T04:22:20ZengMDPI AGEnergies1996-10732015-07-01887690770210.3390/en8087690en8087690Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum OriginIssouf Fofana0John Sabau1Amidou Betie2Canada Research Chair on Insulating Liquids and Mixed Dielectrics for Electrotechnology (ISOLIME), University of Quebec at Chicoutimi, 555 Boulevard de l'université, Chicoutimi, QC G7H 2B1, CanadaInsoil Canada Ltd., 231 Hampshire Place NW, Calgary, AB T3A 4Y7, CanadaCanada Research Chair on Insulating Liquids and Mixed Dielectrics for Electrotechnology (ISOLIME), University of Quebec at Chicoutimi, 555 Boulevard de l'université, Chicoutimi, QC G7H 2B1, CanadaOil/paper insulation degradation in transformers involves chemical and physical changes in the materials. Some of the chemical reactions involve very reactive intermediates called free radicals. Free radicals play a major role in a wide variety of ageing processes. The detection of these reactive species in oil may, in principle, provide useful information for monitoring oil degradation. This manuscript details a laboratory technique, which determines the relative content of free radicals in insulating oils of petroleum origin by a spectrophotometric method. Free radicals may be formed in oils under operating or test conditions. The procedure enables the determination of the relative concentration of free radicals, which can act as the precursors of decay products such as charge carriers, oxidized molecules, as well as polymerization products. The technique involves using a reactive free radical reagent, 2,2-diphenyl-1-picrylhydrazyl (DPPH), added to oil to assess free radical concentration. This method is applicable to new, reclaimed, or used oils as well as naturally or artificially oxidized oil (the cause of aging can be chemical, physical, or electrical). In this contribution, free radicals were assessed following electrical discharge application in oil.http://www.mdpi.com/1996-1073/8/8/7690free radicalsinsulating oilreaction kinetics |
| spellingShingle | Issouf Fofana John Sabau Amidou Betie Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin Energies free radicals insulating oil reaction kinetics |
| title | Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin |
| title_full | Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin |
| title_fullStr | Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin |
| title_full_unstemmed | Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin |
| title_short | Measurement of the Relative Free Radical Content of Insulating Oils of Petroleum Origin |
| title_sort | measurement of the relative free radical content of insulating oils of petroleum origin |
| topic | free radicals insulating oil reaction kinetics |
| url | http://www.mdpi.com/1996-1073/8/8/7690 |
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