Selective Aqueous Extraction and Green Spectral Analysis of Furfural as an Aging Indicator in Power Transformer Insulating Fluid
(2023) In separations 10(7).- Abstract
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... (More)
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.
(Less)
- author
- Park, Hyunjoo ; Kim, Eunyoung ; Kwak, Byeong Sub ; Jun, Taehyun ; Kawano, Riko and Pyo, Sang Hyun LU
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- aging indicator, furfural, green UV spectral analysis, power transformer insulating fluid, selective aqueous extraction
- in
- separations
- volume
- 10
- issue
- 7
- article number
- 381
- publisher
- MDPI AG
- external identifiers
-
- scopus:85166424864
- ISSN
- 2297-8739
- DOI
- 10.3390/separations10070381
- language
- English
- LU publication?
- yes
- id
- a6c9e266-f4b7-47f2-b2b5-3bd2cdd4f792
- date added to LUP
- 2023-11-02 14:19:17
- date last changed
- 2023-11-02 14:19:17
@article{a6c9e266-f4b7-47f2-b2b5-3bd2cdd4f792,
abstract = {{<p>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.</p>}},
author = {{Park, Hyunjoo and Kim, Eunyoung and Kwak, Byeong Sub and Jun, Taehyun and Kawano, Riko and Pyo, Sang Hyun}},
issn = {{2297-8739}},
keywords = {{aging indicator; furfural; green UV spectral analysis; power transformer insulating fluid; selective aqueous extraction}},
language = {{eng}},
number = {{7}},
publisher = {{MDPI AG}},
series = {{separations}},
title = {{Selective Aqueous Extraction and Green Spectral Analysis of Furfural as an Aging Indicator in Power Transformer Insulating Fluid}},
url = {{http://dx.doi.org/10.3390/separations10070381}},
doi = {{10.3390/separations10070381}},
volume = {{10}},
year = {{2023}},
}