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Sökning: id:"swepub:oai:lup.lub.lu.se:a6c9e266-f4b7-47f2-b2b5-3bd2cdd4f792" > Selective Aqueous E...

Selective Aqueous Extraction and Green Spectral Analysis of Furfural as an Aging Indicator in Power Transformer Insulating Fluid

Park, Hyunjoo (författare)
Korea Electric Power Research Institute
Kim, Eunyoung (författare)
Korea Electric Power Research Institute
Kwak, Byeong Sub (författare)
Korea Electric Power Research Institute
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Jun, Taehyun (författare)
Korea Electric Power Research Institute
Kawano, Riko (författare)
Lund University
Pyo, Sang Hyun (författare)
Lund University,Lunds universitet,Bioteknik,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biotechnology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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 (creator_code:org_t)
2023
2023
Engelska.
Ingår i: separations. - 2297-8739. ; 10:7
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Furfural is an intermediary and aldehyde compound degraded from paper insulation, which is used with liquid fluid in power transformers. It can be utilized as an important indicator to evaluate the degradation degree of the paper insulation and the condition of transformers to predict their lifetime. However, the conventional methods are inevitably inconvenient as they require additional derivatization with hazardous agents and time-consuming chromatographic separation and processes. In this work, a facile and green analysis method for the determination of furfural concentration in the insulating fluid of operating power transformers was developed. As furfural was selectively extracted from the insulting fluid by deionized water, the aqueous solution could be directly subjected to a UV spectral analysis without any derivatization using hazardous agents or hindrance of the fluid in the UV spectrum. The results showed that the spectral method could obtain a favorable linear relationship between the concentration of furfural and its characteristic absorbance at 280 nm (λ max). The limit of detection (LOD) was below 0.1 ppm, which is a sufficient detection level to evaluate the condition of the insulating fluid. Furthermore, the method was compared with the conventional HPLC and colorimetric analyses, revealing satisfactory accuracy and verification of the results. It is possible to measure the furfural concentration in situ using a portable UV-spectrometer at a single wavelength, 280 nm, after simple extraction in the field. This approach offers a novel and green analytical method to quantitatively determine the aromatic furan compounds in a power transformer’s insulating fluid in place without the use of an organic extraction solvent or hazardous reagents for derivatization and analysis.

Ämnesord

NATURVETENSKAP  -- Kemi -- Analytisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Analytical Chemistry (hsv//eng)

Nyckelord

aging indicator
furfural
green UV spectral analysis
power transformer insulating fluid
selective aqueous extraction

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Park, Hyunjoo
Kim, Eunyoung
Kwak, Byeong Sub
Jun, Taehyun
Kawano, Riko
Pyo, Sang Hyun
Om ämnet
NATURVETENSKAP
NATURVETENSKAP
och Kemi
och Analytisk kemi
Artiklar i publikationen
separations
Av lärosätet
Lunds universitet

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