Cargando…

Anode electrolysis of sulfides

Traditional sulfide metallurgy produces harmful sulfur dioxide and is energy intensive. To this end, we develop an anode electrolysis approach in molten salt by which sulfide is electrochemically split into sulfur gas at a graphite inert anode while releasing metal ions that diffuse toward and are d...

Descripción completa

Detalles Bibliográficos
Autores principales: Qu, Jiakang, Chen, Xiang, Xie, Hongwei, Gao, Shuaibo, Wang, Dihua, Yin, Huayi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351540/
https://www.ncbi.nlm.nih.gov/pubmed/35878036
http://dx.doi.org/10.1073/pnas.2202884119
_version_ 1784762465752449024
author Qu, Jiakang
Chen, Xiang
Xie, Hongwei
Gao, Shuaibo
Wang, Dihua
Yin, Huayi
author_facet Qu, Jiakang
Chen, Xiang
Xie, Hongwei
Gao, Shuaibo
Wang, Dihua
Yin, Huayi
author_sort Qu, Jiakang
collection PubMed
description Traditional sulfide metallurgy produces harmful sulfur dioxide and is energy intensive. To this end, we develop an anode electrolysis approach in molten salt by which sulfide is electrochemically split into sulfur gas at a graphite inert anode while releasing metal ions that diffuse toward and are deposited at the cathode. The anodic splitting dictates the “sulfide-to-metal ion and sulfur gas” conversion that makes the reaction recur continuously. Using this approach, Cu(2)S is converted to sulfur gas and Cu in molten LiCl-KCl at 500 °C with a current efficiency of 99% and energy consumption of 0.420 kWh/kg(−Cu) (only considering the electricity for electrolysis). Besides Cu(2)S, the anode electrolysis can extract Cu from Cu matte that is an intermediate product from the traditional sulfide smelting process. More broadly, Fe, Ni, Pb, and Sb are extracted from FeS, CuFeS(2), NiS, PbS, and Sb(2)S(3), providing a general electrochemical method for sulfide metallurgy.
format Online
Article
Text
id pubmed-9351540
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher National Academy of Sciences
record_format MEDLINE/PubMed
spelling pubmed-93515402023-01-25 Anode electrolysis of sulfides Qu, Jiakang Chen, Xiang Xie, Hongwei Gao, Shuaibo Wang, Dihua Yin, Huayi Proc Natl Acad Sci U S A Physical Sciences Traditional sulfide metallurgy produces harmful sulfur dioxide and is energy intensive. To this end, we develop an anode electrolysis approach in molten salt by which sulfide is electrochemically split into sulfur gas at a graphite inert anode while releasing metal ions that diffuse toward and are deposited at the cathode. The anodic splitting dictates the “sulfide-to-metal ion and sulfur gas” conversion that makes the reaction recur continuously. Using this approach, Cu(2)S is converted to sulfur gas and Cu in molten LiCl-KCl at 500 °C with a current efficiency of 99% and energy consumption of 0.420 kWh/kg(−Cu) (only considering the electricity for electrolysis). Besides Cu(2)S, the anode electrolysis can extract Cu from Cu matte that is an intermediate product from the traditional sulfide smelting process. More broadly, Fe, Ni, Pb, and Sb are extracted from FeS, CuFeS(2), NiS, PbS, and Sb(2)S(3), providing a general electrochemical method for sulfide metallurgy. National Academy of Sciences 2022-07-25 2022-08-02 /pmc/articles/PMC9351540/ /pubmed/35878036 http://dx.doi.org/10.1073/pnas.2202884119 Text en Copyright © 2022 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Physical Sciences
Qu, Jiakang
Chen, Xiang
Xie, Hongwei
Gao, Shuaibo
Wang, Dihua
Yin, Huayi
Anode electrolysis of sulfides
title Anode electrolysis of sulfides
title_full Anode electrolysis of sulfides
title_fullStr Anode electrolysis of sulfides
title_full_unstemmed Anode electrolysis of sulfides
title_short Anode electrolysis of sulfides
title_sort anode electrolysis of sulfides
topic Physical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351540/
https://www.ncbi.nlm.nih.gov/pubmed/35878036
http://dx.doi.org/10.1073/pnas.2202884119
work_keys_str_mv AT qujiakang anodeelectrolysisofsulfides
AT chenxiang anodeelectrolysisofsulfides
AT xiehongwei anodeelectrolysisofsulfides
AT gaoshuaibo anodeelectrolysisofsulfides
AT wangdihua anodeelectrolysisofsulfides
AT yinhuayi anodeelectrolysisofsulfides