Kinetics of corrosive sulfur adsorption in transformer oil with Ag-Y, Ce-Y and Cu-Y zeolites

Jun Hu; Deliang He; Tao wan; Huibin Lei; Yao Lu; Houqiang Huang

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Kinetics of corrosive sulfur adsorption in transformer oil with Ag-Y, Ce-Y and Cu-Y zeolites

Jun Hu 1,Deliang He 2 *,Tao wan 2,Huibin Lei 2,Yao Lu 2,Houqiang Huang 2

1.College of Chemistry and Chemical Engineering，Hunan University,410082;College of Chemistry and Chemical Engineering，Hunan University,410082; Hunan Electric Power Corporation Research Institute, Changsha,410007;College of Chemistry and Chemical Engineering，Hunan University,410082;College of Chemistry and Chemical Engineering，Hunan University,410082;College of Chemistry and Chemical Engineering，Hunan University,410082

*Correspondence author

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Funding: none

Opened online:30 May 2018

Accepted by: none

Citation: Jun Hu,Deliang He,Tao wan.Kinetics of corrosive sulfur adsorption in transformer oil with Ag-Y, Ce-Y and Cu-Y zeolites[OL]. [30 May 2018] http://en.paper.edu.cn/en_releasepaper/content/4745164

The Ag-Y, Ce-Y and Cu-Y zeolites were successfully prepared for removing corrosive sulfur from transformer insulating oil. The adsorptions and kinetics of corrosive sulfur on Ag-Y, Ce-Y and Cu-Y were studied, and activation energies (Ea) of adsorption processes were calculated. The results show that the desulfurization properties of these three adsorbents were Ag-Y > Ce-Y > Cu-Y, and 0.5wt% Ag-Y adsorption capacity of DBDS and NDM was up to 15.2mg/g and 18.8mg/g respectively. The kinetics for the adsorption process can be described by pseudo-second-order model and adsorption rate constants increase with an increase of temperature, indicating the endothermic nature of the adsorption. The adsorption process on Ag-Y was dominated by chemical adsorption, whereas the adsorption process on Ce-Y was dominated by physical adsorption, and the adsorption on Cu-Y was performed simultaneously by chemical and physical adsorption.

Keywords:Zeolites; Adsorption kinetics; Corrosive sulfur; Activation energies; Transformer oil

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