TY  - JOUR
AU  - Janković, Jelena
AU  - Lukić, Jelena
AU  - Kolarski, Dejan
AU  - Veljović, Đorđe
AU  - Radovanović, Željko
AU  - Dimitrijević, Silvana
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6420
AB  - Elemental sulfur (S8) is a corrosive sulfur compound which was found to be extremely reactive to silver, causing intensive silver sulfide (Ag2S) deposition on on-load tap changer (OLTC) contacts in power transformers. A highly selective adsorbent (HSA), called Tesla’Ssorb, for the removal of S8 from mineral insulating oils was prepared from raw material (RM) using the novel procedure. In this study, the adsorption properties of HSA for the removal of S8 from the oil were determined. RM and HSA were characterized using various techniques, such as field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX), and X-ray diffraction (XRD). The performance of HSA was determined by adsorption equilibrium, thermodynamic, and kinetic study through batch experiments, at various temperatures and initial concentrations of S8. The obtained results were analyzed by Langmuir and Freundlich adsorption isotherms and it was found that equilibrium data were fitted better with the Langmuir isotherm model. The maximum adsorption capacity was 4.84 mg of S8/g of HSA at 353 K. Thermodynamic parameters, such as enthalpy (ΔH°), Gibbs free energy (ΔG°), and entropy (ΔS°), were calculated and it was found that the sorption process was spontaneous (ΔG° < 0) and endothermic in nature (ΔH° > 0). It was found that the adsorption of S8 follows pseudo-second-order kinetic model, and the activation energy indicated the activated chemisorption process.
PB  - MDPI
T2  - Materials
T1  - Isotherm, Thermodynamic and Kinetic Studies of Elemental Sulfur Removal from Mineral Insulating Oils Using Highly Selective Adsorbent
IS  - 9
SP  - 3522
VL  - 16
DO  - 10.3390/ma16093522
ER  - 

@article{
author = "Janković, Jelena and Lukić, Jelena and Kolarski, Dejan and Veljović, Đorđe and Radovanović, Željko and Dimitrijević, Silvana",
year = "2023",
abstract = "Elemental sulfur (S8) is a corrosive sulfur compound which was found to be extremely reactive to silver, causing intensive silver sulfide (Ag2S) deposition on on-load tap changer (OLTC) contacts in power transformers. A highly selective adsorbent (HSA), called Tesla’Ssorb, for the removal of S8 from mineral insulating oils was prepared from raw material (RM) using the novel procedure. In this study, the adsorption properties of HSA for the removal of S8 from the oil were determined. RM and HSA were characterized using various techniques, such as field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX), and X-ray diffraction (XRD). The performance of HSA was determined by adsorption equilibrium, thermodynamic, and kinetic study through batch experiments, at various temperatures and initial concentrations of S8. The obtained results were analyzed by Langmuir and Freundlich adsorption isotherms and it was found that equilibrium data were fitted better with the Langmuir isotherm model. The maximum adsorption capacity was 4.84 mg of S8/g of HSA at 353 K. Thermodynamic parameters, such as enthalpy (ΔH°), Gibbs free energy (ΔG°), and entropy (ΔS°), were calculated and it was found that the sorption process was spontaneous (ΔG° < 0) and endothermic in nature (ΔH° > 0). It was found that the adsorption of S8 follows pseudo-second-order kinetic model, and the activation energy indicated the activated chemisorption process.",
publisher = "MDPI",
journal = "Materials",
title = "Isotherm, Thermodynamic and Kinetic Studies of Elemental Sulfur Removal from Mineral Insulating Oils Using Highly Selective Adsorbent",
number = "9",
pages = "3522",
volume = "16",
doi = "10.3390/ma16093522"
}

Janković, J., Lukić, J., Kolarski, D., Veljović, Đ., Radovanović, Ž.,& Dimitrijević, S.. (2023). Isotherm, Thermodynamic and Kinetic Studies of Elemental Sulfur Removal from Mineral Insulating Oils Using Highly Selective Adsorbent. in Materials
MDPI., 16(9), 3522.
https://doi.org/10.3390/ma16093522

Janković J, Lukić J, Kolarski D, Veljović Đ, Radovanović Ž, Dimitrijević S. Isotherm, Thermodynamic and Kinetic Studies of Elemental Sulfur Removal from Mineral Insulating Oils Using Highly Selective Adsorbent. in Materials. 2023;16(9):3522.
doi:10.3390/ma16093522 .

Janković, Jelena, Lukić, Jelena, Kolarski, Dejan, Veljović, Đorđe, Radovanović, Željko, Dimitrijević, Silvana, "Isotherm, Thermodynamic and Kinetic Studies of Elemental Sulfur Removal from Mineral Insulating Oils Using Highly Selective Adsorbent" in Materials, 16, no. 9 (2023):3522,
https://doi.org/10.3390/ma16093522 . .