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Colli A, Uasuf Vega B, Bisang J. Mass-transfer studies in a parallel-plate electrochemical reactor with ultrasonic assistance under single-phase and two-phase (gas-evolving) flows. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.117011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Contigiani CC, Fornés JP, González Pérez O, Bisang JM. Colloidal sulphur production by electrochemical oxidation of sulphide in a swirling flow reactor. REACT CHEM ENG 2022. [DOI: 10.1039/d1re00395j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A swirling flow electrochemical reactor is suitable for the colloidal sulphur production by means of sulphide electrochemical oxidation.
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Affiliation(s)
- Camila C. Contigiani
- Universidad Nacional del Litoral, CONICET, Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE), Facultad de Ingeniería Química, Santiago del Estero 2829 S3000AOM, Santa Fe, Argentina
| | - Juan P. Fornés
- Universidad Nacional del Litoral, CONICET, Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE), Facultad de Ingeniería Química, Santiago del Estero 2829 S3000AOM, Santa Fe, Argentina
| | - Omar González Pérez
- Universidad Nacional del Litoral, CONICET, Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE), Facultad de Ingeniería Química, Santiago del Estero 2829 S3000AOM, Santa Fe, Argentina
| | - José M. Bisang
- Universidad Nacional del Litoral, CONICET, Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE), Facultad de Ingeniería Química, Santiago del Estero 2829 S3000AOM, Santa Fe, Argentina
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Performance of Sulfide-Driven Fuel Cell Aerated by Venturi Tube Ejector. Catalysts 2021. [DOI: 10.3390/catal11060694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hydrogen sulfide is frequently met in natural waters, like mineral springs, but mostly it is found in marine water with low renewal rate. The Black Sea has extremely high hydrogen sulfide content. It can be utilized in different ways, but the most promising one is direct conversion into electricity. This result can be attained by a sulfide-driven fuel cell (SDFC), converting sulfide to sulfate thus releasing electric energy up to 24 GJ/t. One of the most important problems is the mass transfer limitation on oxygen transfer in the cathode space of the fuel cell. This problem can be solved using a gas diffusion electrode or highly efficient saturation by oxygen in an ejector of the Venturi tube type. This work presents experimental data in laboratory-scale SDFC for sulfide conversion into sulfate, sulfite and polysulfide releasing different amounts of electric energy. Two types of aeration are tested: direct air blow and Venturi-tube ejector. Besides pure graphite, two catalysts, i.e., cobalt spinel and zirconia-doped graphite were tested as anodes. Experiments were carried out at initial sulfide concentrations from 50 to 300 mg/L. Sulfate, sulfite and thiosulfate ions were detected in the outlet solutions from the fuel cell. The electrochemical results show good agreement with the chemical analyses. Most of the results show attained high efficiencies of the fuel cell, i.e., up to 80%. The practical applications of this method can be extended for other purposes, like treatment of polluted water together with utilization as energy.
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ZHANG Z, WANG H, SUN L. A Novel Modification Method of Stainless-steel Electrode for Sulfur Preparation by Reduction of Sulfur Dioxide. ELECTROCHEMISTRY 2020. [DOI: 10.5796/electrochemistry.19-00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Zhengyang ZHANG
- Department of Metallurgy Engineering, Beijing General Research Institute of Mining & Metallurgy
| | - Haibei WANG
- Department of Metallurgy Engineering, Beijing General Research Institute of Mining & Metallurgy
| | - Liugen SUN
- Department of Metallurgy Engineering, Beijing General Research Institute of Mining & Metallurgy
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Colli A, Fornés J, González Pérez O, Bisang J. Evaluation of a modified hydrocyclone as electrochemical reactor for processing of two-phase (gas-liquid) systems. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Fornés J, Bisang J. Production of colloidal sulphur from reduction of sulphur dioxide by contact deposition with 304 stainless steel. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.10.164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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