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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...

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Main Authors: Abdul Raof, Nurliyana, Yunus, Robiah, Rashid, Umer, Azis, Norhafiz, Yaakub, Zaini
Format: Article
Language:English
Published: Elsevier 2019
Online Access:http://psasir.upm.edu.my/id/eprint/79522/1/Effect%20of%20molecular%20structure%20on%20oxidative%20degradation%20of%20ester%20based%20transformer%20oil.pdf
http://psasir.upm.edu.my/id/eprint/79522/
https://www.sciencedirect.com/science/article/abs/pii/S0301679X19303597
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
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.
format Article
author Abdul Raof, Nurliyana
Yunus, Robiah
Rashid, Umer
Azis, Norhafiz
Yaakub, Zaini
spellingShingle Abdul Raof, Nurliyana
Yunus, Robiah
Rashid, Umer
Azis, Norhafiz
Yaakub, Zaini
Effect of molecular structure on oxidative degradation of ester based transformer oil
author_facet Abdul Raof, Nurliyana
Yunus, Robiah
Rashid, Umer
Azis, Norhafiz
Yaakub, Zaini
author_sort Abdul Raof, Nurliyana
title 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_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_sort effect of molecular structure on oxidative degradation of ester based transformer oil
publisher Elsevier
publishDate 2019
url http://psasir.upm.edu.my/id/eprint/79522/1/Effect%20of%20molecular%20structure%20on%20oxidative%20degradation%20of%20ester%20based%20transformer%20oil.pdf
http://psasir.upm.edu.my/id/eprint/79522/
https://www.sciencedirect.com/science/article/abs/pii/S0301679X19303597
_version_ 1701164420550361088
score 13.211869

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