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]
|Titolo:||An Electrochemical Platform for the Carbon Dioxide Capture and Conversion to Syngas|
|Data di pubblicazione:||2021|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/en14237869|
|Appare nelle tipologie:||1.1 Articolo in rivista|