Effects of electrochemical potential on sulfur removal in the molten CaO-SiO2-Al2O3 system

Sang Hoon Lee, Dong Joon Min

Research output: Contribution to journalArticle

Abstract

The effect of electrical potential on refining capacity was studied to overcome the limit of sulfur removal by slag treatment. Cyclic voltammetry analysis indicated that electrochemical desulfurization enhances the refining capacity by applying an electric potential between liquid Cu and a CaO-SiO2-Al2O3 slag system at 1773 K. The correlation between the external potential and the sulfur partition ratio showed that the external potential enhanced the latter. Experimental results suggested that it is difficult to quantitatively evaluate the effect of the electrical desulfurization by means of the ideal correlation between the electrical potential and the sulfur partition ratio based on the Nernst equation because of the IR drop. Further, the IR drop alone was not sufficient to account for the correlation between the electrical potential and the sulfur partition ratio. Therefore, the relationship between the structural properties of slag and the effect of electrical desulfurization based on the electrochemical mechanism of sulfur refining is discussed in detail.

Original languageEnglish
Article number116231
JournalSeparation and Purification Technology
DOIs
Publication statusAccepted/In press - 2019 Jan 1

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Desulfurization
Sulfur
Molten materials
Slags
Refining
Cyclic voltammetry
Structural properties
Liquids
Electric potential

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation

Cite this

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abstract = "The effect of electrical potential on refining capacity was studied to overcome the limit of sulfur removal by slag treatment. Cyclic voltammetry analysis indicated that electrochemical desulfurization enhances the refining capacity by applying an electric potential between liquid Cu and a CaO-SiO2-Al2O3 slag system at 1773 K. The correlation between the external potential and the sulfur partition ratio showed that the external potential enhanced the latter. Experimental results suggested that it is difficult to quantitatively evaluate the effect of the electrical desulfurization by means of the ideal correlation between the electrical potential and the sulfur partition ratio based on the Nernst equation because of the IR drop. Further, the IR drop alone was not sufficient to account for the correlation between the electrical potential and the sulfur partition ratio. Therefore, the relationship between the structural properties of slag and the effect of electrical desulfurization based on the electrochemical mechanism of sulfur refining is discussed in detail.",
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AU - Min, Dong Joon

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N2 - The effect of electrical potential on refining capacity was studied to overcome the limit of sulfur removal by slag treatment. Cyclic voltammetry analysis indicated that electrochemical desulfurization enhances the refining capacity by applying an electric potential between liquid Cu and a CaO-SiO2-Al2O3 slag system at 1773 K. The correlation between the external potential and the sulfur partition ratio showed that the external potential enhanced the latter. Experimental results suggested that it is difficult to quantitatively evaluate the effect of the electrical desulfurization by means of the ideal correlation between the electrical potential and the sulfur partition ratio based on the Nernst equation because of the IR drop. Further, the IR drop alone was not sufficient to account for the correlation between the electrical potential and the sulfur partition ratio. Therefore, the relationship between the structural properties of slag and the effect of electrical desulfurization based on the electrochemical mechanism of sulfur refining is discussed in detail.

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