A Novel Electrochemical Process for Desulfurization in the CaO-SiO2-Al2O3 System
Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
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Materials 2020, 13(11), 2478; https://doi.org/10.3390/ma13112478
Received: 16 April 2020
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Revised: 12 May 2020
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Accepted: 26 May 2020
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Published: 29 May 2020
(This article belongs to the Special Issue Environment-Friendly Electrochemical Processes)
The effect of electric potential on the sulfide capacity of the CaO-SiO2-Al2O3 system was evaluated by applying voltages in the range of −1.5 to 1.5 V at 1823 K in a C/CO gas equilibrium. When the cathodic potential (−1.5 to 0 V) was applied, it was confirmed that the sulfur partition ratio increased based on the electrochemical reaction of sulfur (S + 2e− = S2−). However, the reversibility of the electrochemical resulfurization reaction (S2− = S + 2e−) in slag was not established in the reverse (anodic) potential region (0–1.5 V), yet the sulfur partition ratio increased. In particular, sulfur evaporation was observed in the anodic potential region. Therefore, in the present study, potential anodic electro-desulfurization mechanisms based on sulfur evaporation are proposed. To verify these mechanisms, sulfur evaporation is discussed in detail as a function of the thermodynamic stability of sulfur in the slag.
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Keywords:
electric potential; electro-desulfurization; oxidative desulfurization; sulfur evaporation
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MDPI and ACS Style
Lee, S.H.; Min, D.J. A Novel Electrochemical Process for Desulfurization in the CaO-SiO2-Al2O3 System. Materials 2020, 13, 2478. https://doi.org/10.3390/ma13112478
AMA Style
Lee SH, Min DJ. A Novel Electrochemical Process for Desulfurization in the CaO-SiO2-Al2O3 System. Materials. 2020; 13(11):2478. https://doi.org/10.3390/ma13112478
Chicago/Turabian StyleLee, Sang H., and Dong J. Min. 2020. "A Novel Electrochemical Process for Desulfurization in the CaO-SiO2-Al2O3 System" Materials 13, no. 11: 2478. https://doi.org/10.3390/ma13112478
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