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Preparation of Ag/γ-Al2O3 and Its Adsorption Performance on Dibenzyl Disulfide in Insulating Oil
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Yihua QIAN, Yaohong ZHAO, Qing WANG, Siwei PAN
Insulating Materials | 2022, 55(8) : 45 - 51
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Insulating Materials | 2022, 55(8): 45-51
• Material Research •
Preparation of Ag/γ-Al2O3 and Its Adsorption Performance on Dibenzyl Disulfide in Insulating Oil
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Yihua QIAN, Yaohong ZHAO, Qing WANG, Siwei PAN
Affiliations
  • Electric Power Research Institute of Guangdong Power Grid Corporation, Key Laboratory of Guangdong Power Equipment Reliability Enterprise, Guangzhou 510080, China
Published: 2022-08-20 doi: 10.16790/j.cnki.1009-9239.im.2022.08.008
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Dibenzyl disulfide (DBDS) is a corrosive impurity in transformer oil, which can easily lead to transformer failure. In this paper, a γ-Al2O3 was prepared from pseudo-boehmite by calcination method, and a series of Ag/γ-Al2O3 were prepared by loading Ag+ on γ-Al2O3 carrier by equal volume impregnation method. The adsorption phase equilibrium and kinetics curves of dibenzyl disulfide on Ag/γ-Al2O3 and the removal rate of dibenzyl disulfide in operating transformer oil by Ag/γ-Al2O3 were studied. The results show that the adsorption isotherm of DBDS on Ag/γ-Al2O3 belongs to Langmuir model. The equilibrium adsorption capacity of Ag/γ-Al2O3 for DBDS is 69.5 mg/g at 298 K, which is 105.9 times higher than that of γ-Al2O3, showing excellent adsorption performance. The removal rate of Ag/γ-Al2O3 for DBDS in the operating transformer oil is close to 100% under appropriate mass ratio of oil and adsorbent, and the DBDS adsorption capacity of Ag/γ-Al2O3 is not affected by temperature changes. The adsorption kinetic process of DBDS on Ag/γ-Al2O3 is well fitted by the pseudo-second-order kinetics model, and the activation energy of DBDS desorbing from Ag/γ-Al2O3 is 71.673 kJ/mol.

Ag/γ-Al2O3  /  dibenzyl disulfide  /  isotherms  /  kinetics  /  transformer oil
Yihua QIAN, Yaohong ZHAO, Qing WANG, Siwei PAN. Preparation of Ag/γ-Al2O3 and Its Adsorption Performance on Dibenzyl Disulfide in Insulating Oil[J]. Insulating Materials, 2022 , 55 (8) : 45 -51 . DOI: 10.16790/j.cnki.1009-9239.im.2022.08.008
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.08.008
  • Receive Date：2021-09-03
  • Online Date：2025-12-23
  • Published：2022-08-20
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History
  • Received：2021-09-03
  • Revised：2021-11-05
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    Electric Power Research Institute of Guangdong Power Grid Corporation, Key Laboratory of Guangdong Power Equipment Reliability Enterprise, Guangzhou 510080, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.08.008
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
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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