Desulfurization kinetics and mineral phase evolution of bauxite water slurry (BWS) electrolysis

Gong, Xuzhong; Zhuang, Siyuan; Wang, Chuanzhen; Wang, Zhi; Wang, Mingyong

doi:10.1016/j.minpro.2015.04.010

Cited by 25 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in temperature strengthened the diffusion rate and loss of the electron capability of OH – on the anode, and thus, the oxygen evolution potential decreased with temperature. Additionally, our previous results revealed that the bauxite desulfurization ratio obviously increased with temperature, , verifying the analysis and discussion above. From Figure , the current density of bauxite electrolysis with 200 g/L was obviously lower than that with 5 g/L at the same potential, implying that bauxite particles inhibited oxygen evolution.…”

Section: Resultssupporting

confidence: 87%

“…11,13 More importantly, the electrolysis process could simultaneously remove organic and inorganic sulfurs in minerals (e.g., coal electrolysis). Furthermore, on the basis of our previous studies, 21,22 the electrolysis desulfurization was indeed more suitable to inorganic ores than organic ones (e.g., coal electrolysis) 9,10 that would form some organic product cover on the anode and thus deactivate the reaction during the electrolysis.…”

Section: Introductionmentioning

confidence: 92%

“…29 The indirect oxidation is generally the primary reaction on the anode during the ore electrolysis. 30,31 Bauxite electrolysis in NaOH solution also includes the following direct and indirect oxidations: 21 direct electrolysis oxidation reaction…”

Section: Introductionmentioning

confidence: 99%

“…Bauxite electrolysis in NaOH solution also includes the following direct and indirect oxidations: direct electrolysis oxidation reaction indirect electrolysis oxidation reaction …”

Section: Introductionmentioning

confidence: 99%

“…The previous research has shown that the slurry concentration, pH, E h , NaOH concentration, and stirring rate are all important parameters in the desulfurization. The electrolysis process has been examined by using desulfurization with conditions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Competition of Oxygen Evolution and Desulfurization for Bauxite Electrolysis

Gong

Wang

Zhao

et al. 2017

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

To understand the relationship between oxygen evolution and desulfurization for bauxite electrolysis, the apparent activation energy of the anode reaction was examined by analyzing the polarization curves. The results showed that the apparent activation energy of the anode reaction for bauxite electrolysis with a low slurry concentration was lower than that of water electrolysis, indicating that the bauxite particles had some microcell disturbance effects on liquid diffusion. As expected, it was also lower than that of bauxite electrolysis with a high slurry concentration, indicating that the bauxite particles had some inhibition effects on oxygen evolution. Compared with adding bauxite, the increase in stirring speed did not change the concentration polarization of water electrolysis, indicating that the microcell disturbance effect of the bauxite particles was more important. Compared with the low slurry concentration electrolysis, the high slurry concentration electrolysis resulted in a low desulfurization ratio and high current efficiency during bauxite electrolysis.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

“…Bauxite electrolysis in NaOH solution also includes the following direct and indirect oxidations: direct electrolysis oxidation reaction indirect electrolysis oxidation reaction …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations