Effect of molecular structure on oxidative degradation of ester based transformer oil
Methyl esters of coconut, palm kernel and palm oils were transesterified with 2-ethylhexanol, trimethylolpropane or neopentylglycol to produce monoester and polyol esters in this study. Experimental investigations were conducted to explore the thermal-oxidative characteristics and catalytic effects...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019
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| Online Access: | http://psasir.upm.edu.my/id/eprint/79522/ http://psasir.upm.edu.my/id/eprint/79522/1/Effect%20of%20molecular%20structure%20on%20oxidative%20degradation%20of%20ester%20based%20transformer%20oil.pdf |
| _version_ | 1848858700154929152 |
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| author | Abdul Raof, Nurliyana Yunus, Robiah Rashid, Umer Azis, Norhafiz Yaakub, Zaini |
| author_facet | Abdul Raof, Nurliyana Yunus, Robiah Rashid, Umer Azis, Norhafiz Yaakub, Zaini |
| author_sort | Abdul Raof, Nurliyana |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Methyl esters of coconut, palm kernel and palm oils were transesterified with 2-ethylhexanol, trimethylolpropane or neopentylglycol to produce monoester and polyol esters in this study. Experimental investigations were conducted to explore the thermal-oxidative characteristics and catalytic effects of copper/iron on monoester and polyol esters by using the turbine oil oxidation test. Thermogravimetric analysis and differential scanning calorimetry were also performed to evaluate the thermal and oxidation onset temperature. Among the structural trends that improved the oxidative stability include increasing carbon chain length and presence of monounsaturated as opposed to saturated fraction. The study revealed that the presence of copper accelerated the degradation of certain polyol esters. Also, polyol esters are found to be thermally more stable than mineral transformer oils. |
| first_indexed | 2025-11-15T12:17:36Z |
| format | Article |
| id | upm-79522 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T12:17:36Z |
| publishDate | 2019 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-795222021-05-29T22:50:31Z http://psasir.upm.edu.my/id/eprint/79522/ Effect of molecular structure on oxidative degradation of ester based transformer oil Abdul Raof, Nurliyana Yunus, Robiah Rashid, Umer Azis, Norhafiz Yaakub, Zaini Methyl esters of coconut, palm kernel and palm oils were transesterified with 2-ethylhexanol, trimethylolpropane or neopentylglycol to produce monoester and polyol esters in this study. Experimental investigations were conducted to explore the thermal-oxidative characteristics and catalytic effects of copper/iron on monoester and polyol esters by using the turbine oil oxidation test. Thermogravimetric analysis and differential scanning calorimetry were also performed to evaluate the thermal and oxidation onset temperature. Among the structural trends that improved the oxidative stability include increasing carbon chain length and presence of monounsaturated as opposed to saturated fraction. The study revealed that the presence of copper accelerated the degradation of certain polyol esters. Also, polyol esters are found to be thermally more stable than mineral transformer oils. Elsevier 2019-12 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/79522/1/Effect%20of%20molecular%20structure%20on%20oxidative%20degradation%20of%20ester%20based%20transformer%20oil.pdf Abdul Raof, Nurliyana and Yunus, Robiah and Rashid, Umer and Azis, Norhafiz and Yaakub, Zaini (2019) Effect of molecular structure on oxidative degradation of ester based transformer oil. Tribology International, 140. ISSN 0301-679X https://www.sciencedirect.com/science/article/abs/pii/S0301679X19303597 10.1016/j.triboint.2019.105852 |
| spellingShingle | Abdul Raof, Nurliyana Yunus, Robiah Rashid, Umer Azis, Norhafiz Yaakub, Zaini Effect of molecular structure on oxidative degradation of ester based transformer oil |
| title | Effect of molecular structure on oxidative degradation of ester based transformer oil |
| title_full | Effect of molecular structure on oxidative degradation of ester based transformer oil |
| title_fullStr | Effect of molecular structure on oxidative degradation of ester based transformer oil |
| title_full_unstemmed | Effect of molecular structure on oxidative degradation of ester based transformer oil |
| title_short | Effect of molecular structure on oxidative degradation of ester based transformer oil |
| title_sort | effect of molecular structure on oxidative degradation of ester based transformer oil |
| url | http://psasir.upm.edu.my/id/eprint/79522/ http://psasir.upm.edu.my/id/eprint/79522/ http://psasir.upm.edu.my/id/eprint/79522/ http://psasir.upm.edu.my/id/eprint/79522/1/Effect%20of%20molecular%20structure%20on%20oxidative%20degradation%20of%20ester%20based%20transformer%20oil.pdf |