We report on a simple electrochemical system able to capture gaseous carbon dioxide from a gas mixture and convert it into syngas. The capture/release module is implemented via regeneration of NaOH and acidification of NaHCO3 inside a four-chamber electrochemical flow cell employing Pt foils as catalysts, while the conversion is carried out by a coupled reactor that performs electrochemical reduction of carbon dioxide using ZnO as a catalyst and KHCO3 as an electrolyte. The capture module is optimized such that, powered by a current density of 100 mA/cm2 , from a mixture of the CO2–N2 gas stream, a pure and stable CO2 outlet flow of 4–5 mL/min is obtained. The conversion module is able to convert the carbon dioxide into a mixture of gaseous CO and H2 (syngas) with a selectivity for the carbon monoxide of 56%. This represents the first all-electrochemical system for carbon dioxide capture and conversion.

An Electrochemical Platform for the Carbon Dioxide Capture and Conversion to Syngas / Mezza, Alessio; Pettigiani, Angelo; Monti, N. B. D.; Bocchini, Sergio; Farkhondehfal, M. Amin; Zeng, Juqin; Chiodoni, Angelica; Pirri, Candido F.; Sacco, Adriano. - In: ENERGIES. - ISSN 1996-1073. - ELETTRONICO. - 14:23(2021), p. 7869. [10.3390/en14237869]

An Electrochemical Platform for the Carbon Dioxide Capture and Conversion to Syngas

Mezza, Alessio;Monti, N. B. D.;Bocchini, Sergio;Farkhondehfal, M. Amin;Zeng, Juqin;Chiodoni, Angelica;Pirri, Candido F.;Sacco, Adriano
2021

Abstract

We report on a simple electrochemical system able to capture gaseous carbon dioxide from a gas mixture and convert it into syngas. The capture/release module is implemented via regeneration of NaOH and acidification of NaHCO3 inside a four-chamber electrochemical flow cell employing Pt foils as catalysts, while the conversion is carried out by a coupled reactor that performs electrochemical reduction of carbon dioxide using ZnO as a catalyst and KHCO3 as an electrolyte. The capture module is optimized such that, powered by a current density of 100 mA/cm2 , from a mixture of the CO2–N2 gas stream, a pure and stable CO2 outlet flow of 4–5 mL/min is obtained. The conversion module is able to convert the carbon dioxide into a mixture of gaseous CO and H2 (syngas) with a selectivity for the carbon monoxide of 56%. This represents the first all-electrochemical system for carbon dioxide capture and conversion.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2941252