Study on Molecular Behavior in Oxidation of Insulating Oil using Terahertz Spectroscopy

Nishimura, Nobuaki; Ogura, Ryuichi; Matsumoto, Satoshi; Mizuno, Maya; Fukunaga, Kaori

doi:10.1541/ieejfms.131.943

Cited by 3 publications

(1 citation statement)

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“…On the other hand, at 6.73THz, the absorption non-linearly changed and deviated greatly from broken line. As a result of having calculated for 2-octanol molecule using semi-empirical molecular orbital method, it was found that this peak was attributed to the bending vibration of -OH group [5]. -OH group is strong polar group and forms hydrogen bonds.…”

Section: Resultsmentioning

confidence: 99%

Transmittance spectra of oxidized insulation oil using terahertz spectroscopy

Nishimura

Ogura

Matsumoto

et al. 2011

2011 IEEE International Conference on Dielectric Liquids

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The number of aged power equipment increases and it is important to clarify the characteristics of deteriorated insulating oil. This paper describes the basic study on transmittance spectra of oxidized insulating oils by terahertz spectroscopy. First, the mineral and mixture insulating oils heated in oxygen were measured and observed spectra change. Second, the oxidation process of insulating oil was modeled by using various compositions of dodecane and 2-octanol. The absorption related to hydroxyl groups (-OH) was significantly observed between 6 and 7 THz. And hydrogen bonds were observed from vibration change of OH. The absorption band was also observed in accelerated aging insulating oils used in power equipments as insulating oil.

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Section: Resultsmentioning

confidence: 99%