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Artículo

Electrochemical production of colloidal sulphur by oxidation of sulphide ion at lead coated-2- and -3-dimensional rotating cylinder anode surfaces

Fornes, Juan PabloIcon ; Bisang, Jose MariaIcon
Fecha de publicación: 07/2017
Editorial: Pergamon-Elsevier Science Ltd
Revista: Electrochimica Acta
ISSN: 0013-4686
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

An electrochemical reactor with a rotating cylinder electrode is analysed for the production of colloidal sulphur by oxidation of sulphide ions with a concentration of 2 g dm−3 in alkaline solutions at 80 °C. The anode, coated with lead, was either a smooth cylinder or a three-dimensional one. The formation of polysulphides takes place in a wide range of potential of 0 to 1.2 V, against saturated calomel electrode (SCE), at a constant current density, which is independent on the rotation speed for values higher than 100 rpm. For the smooth anode the space time yield was 0.4 kg m−3 h−1. However, this parameter was increased 5 times in the potential range of 0.8 V to 1.2 V, vs. SCE, by using a three-dimensional structure with a bed depth of 8 mm. The specific energy consumption was 11.7 kW h kg−1 with a current efficiency near 100%. When the sulphide ions were replenished by dissolution of hydrogen sulphide from a gas stream a further increase of the space time yield to 3.6 kg m−3 h−1 was achieved. At the end of the experiments the solution was acidified forming colloidal sulphur particles of different shapes with an average size of 5 μm.
Palabras clave: Colloidal Sulphur , Electrochemical Reactor , Hydrogen Sulphide , Sulphur Production
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/58697
DOI: https://dx.doi.org/10.1016/j.electacta.2017.05.050
URL: https://www.sciencedirect.com/science/article/pii/S0013468617310320
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Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Fornes, Juan Pablo; Bisang, Jose Maria; Electrochemical production of colloidal sulphur by oxidation of sulphide ion at lead coated-2- and -3-dimensional rotating cylinder anode surfaces; Pergamon-Elsevier Science Ltd; Electrochimica Acta; 243; 7-2017; 90-97
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