Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO2 and to Convert H2S into Hydrogen and Solid Sulfur

Removing CO2 from natural gas or biogas in the presence of H2S is technically challenging and expensive as it often requires separation of both acid gases from the gas, typically using an aqueous amine solution, followed by separation of CO2&l...

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Autores principales:	Frédérick de Meyer, Charles Bignaud, Bénédicte Poulain
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CO<sub>2</sub> capture hydrogen sulfide electrochemistry regeneration amine gas treatment Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/1a23fa9ba7db48e49d10425c46078015
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spelling	oai:doaj.org-article:1a23fa9ba7db48e49d10425c460780152021-11-11T14:59:11ZSelective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur10.3390/app112198512076-3417https://doaj.org/article/1a23fa9ba7db48e49d10425c460780152021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9851https://doaj.org/toc/2076-3417Removing CO<sub>2</sub> from natural gas or biogas in the presence of H<sub>2</sub>S is technically challenging and expensive as it often requires separation of both acid gases from the gas, typically using an aqueous amine solution, followed by separation of CO<sub>2</sub> from H<sub>2</sub>S and conversion of H<sub>2</sub>S into solid S. In this work, the proof of concept of electrochemical, instead of thermal, regeneration of an aqueous amine solution is developed. This invention might be a very promising technology and has several advantages. It has H<sub>2</sub>S versus CO<sub>2</sub> selectivity of 100%, can directly convert H<sub>2</sub>S into S and H<sub>2</sub>, and is economically competitive with CO<sub>2</sub> desorption energy around 100 kJmol<sup>−1</sup> and H<sub>2</sub>S conversion around 200 kJmol<sup>−1</sup>. If renewable energy is used for electrochemical regeneration, CO<sub>2</sub> emissions due to the CO<sub>2</sub> capture process can be significantly reduced.Frédérick de MeyerCharles BignaudBénédicte PoulainMDPI AGarticleCO<sub>2</sub> capturehydrogen sulfideelectrochemistryregenerationaminegas treatmentTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9851, p 9851 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CO<sub>2</sub> capture hydrogen sulfide electrochemistry regeneration amine gas treatment Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	CO<sub>2</sub> capture hydrogen sulfide electrochemistry regeneration amine gas treatment Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Frédérick de Meyer Charles Bignaud Bénédicte Poulain Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur
description	Removing CO<sub>2</sub> from natural gas or biogas in the presence of H<sub>2</sub>S is technically challenging and expensive as it often requires separation of both acid gases from the gas, typically using an aqueous amine solution, followed by separation of CO<sub>2</sub> from H<sub>2</sub>S and conversion of H<sub>2</sub>S into solid S. In this work, the proof of concept of electrochemical, instead of thermal, regeneration of an aqueous amine solution is developed. This invention might be a very promising technology and has several advantages. It has H<sub>2</sub>S versus CO<sub>2</sub> selectivity of 100%, can directly convert H<sub>2</sub>S into S and H<sub>2</sub>, and is economically competitive with CO<sub>2</sub> desorption energy around 100 kJmol<sup>−1</sup> and H<sub>2</sub>S conversion around 200 kJmol<sup>−1</sup>. If renewable energy is used for electrochemical regeneration, CO<sub>2</sub> emissions due to the CO<sub>2</sub> capture process can be significantly reduced.
format	article
author	Frédérick de Meyer Charles Bignaud Bénédicte Poulain
author_facet	Frédérick de Meyer Charles Bignaud Bénédicte Poulain
author_sort	Frédérick de Meyer
title	Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur
title_short	Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur
title_full	Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur
title_fullStr	Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur
title_full_unstemmed	Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur
title_sort	selective electrochemical regeneration of aqueous amine solutions to capture co<sub>2</sub> and to convert h<sub>2</sub>s into hydrogen and solid sulfur
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1a23fa9ba7db48e49d10425c46078015
work_keys_str_mv	AT frederickdemeyer selectiveelectrochemicalregenerationofaqueousaminesolutionstocapturecosub2subandtoconverthsub2subsintohydrogenandsolidsulfur AT charlesbignaud selectiveelectrochemicalregenerationofaqueousaminesolutionstocapturecosub2subandtoconverthsub2subsintohydrogenandsolidsulfur AT benedictepoulain selectiveelectrochemicalregenerationofaqueousaminesolutionstocapturecosub2subandtoconverthsub2subsintohydrogenandsolidsulfur
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Selective Electrochemical Regeneration of Aqueous Amine Solutions to Capture CO<sub>2</sub> and to Convert H<sub>2</sub>S into Hydrogen and Solid Sulfur

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