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Adsorption properties of modified silica gel on Fe3+ in wind turbine gear oil
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Guanghui DI1, Shiyuan LI1, Zeyu HUANG2, Qibin XIA2
Thermal Power Generation | 2025, 54(9) : 79 - 85
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Thermal Power Generation | 2025, 54(9): 79-85
• Special topic on low carbon power technology •
Adsorption properties of modified silica gel on Fe3+ in wind turbine gear oil
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Guanghui DI1, Shiyuan LI1, Zeyu HUANG2, Qibin XIA2
Affiliations
  • 1.North China Electric Power Research Institute Co., Ltd., Beijing 100045, China
  • 2.School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
Published: 2025-09-25 doi: 10.19666/j.rlfd.202411234
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A comparative test was conducted on operating oil samples from wind turbine gear oil and a fresh oil sample, revealing that the Fe3+ content was the most rapidly deteriorating indicator. The SG-PEI adsorbent was prepared by loading polyethyleneimine (PEI) onto a silica gel material (SG) through impregnation modification, and its characteristics were evaluated. The adsorption isotherms and kinetics of Fe3+ on SG-PEI were thoroughly investigated. The results indicated that, the adsorption isotherm of Fe3+ on SG-PEI conforms to Langmuir model. The saturated adsorption capacity of SG-PEI for Fe3+ was 28.71 mg/g, representing a 39.2% improvement compared to SG (20.63 mg/g). The adsorption process of Fe3+ on SG-PEI adhered to the pseudo-second-order kinetic model, with adsorption process occurring as a spontaneous exothermic reaction. Under optimal conditions of an adsorption temperature of 60 ℃, an adsorption time of 120 min, and an oil-adsorbent ratio of 100:3, the removal rate of Fe3+ from wind turbine gear oil by SG-PEI reached 96.23%, which is 29.43 times higher than that of the 801 adsorbent (3.27%) and 185.06 times higher than that of Al2O3 (0.52%). The SG-PEI has a good prospect for applications due to its high adsorption capacity and selectivity for Fe3+.

gear oil  /  adsorption regeneration  /  metal removal  /  silica gel  /  modification
Guanghui DI, Shiyuan LI, Zeyu HUANG, Qibin XIA. Adsorption properties of modified silica gel on Fe3+ in wind turbine gear oil[J]. Thermal Power Generation, 2025 , 54 (9) : 79 -85 . DOI: 10.19666/j.rlfd.202411234
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  • Scientific Research Project of North China Electric Power Research Institute Co., Ltd.(KJZ2023119)
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Year 2025 volume 54 Issue 9
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Article Info
doi: 10.19666/j.rlfd.202411234
  • Receive Date：2024-11-25
  • Online Date：2026-03-05
  • Published：2025-09-25
Article Data
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History
  • Received：2024-11-25
Funding
Scientific Research Project of North China Electric Power Research Institute Co., Ltd.(KJZ2023119)
Affiliations
    1.North China Electric Power Research Institute Co., Ltd., Beijing 100045, China
    2.School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202411234
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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