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Galia, Alessandro

Prestigiacomo, Claudia

Proietto, Federica

Scialdone, Onofrio

English

Engineering Conferences International

VALORIZATION OF CO2-RICHED GASEOUS TO FORMIC ACID VIA ELECTROCHEMICAL ROUTES: CURRENT STATUS AND PERSPECTIVES  Federica Proietto, Dipartimento di Ingegneria, Viale delle Scienze, Università di Palermo, Italy Federica.proietto@unipa.it Claudia Prestigiacomo, Dipartimento di Ingegneria, Viale delle Scienze, Università di Palermo, Italy Alessandro Galia, Dipartimento di Ingegneria, Viale delle Scienze, Università di Palermo, Italy Onofrio Scialdone, Dipartimento di Ingegneria, Viale delle Scienze, Università di Palermo, Italy   Key Words: Waste-CO2, Electrochemical CO2 conversion, Formic acid, Sn cathodes  A thermochemical process of waste organic matrices produces a gaseous phase rich in CO2 as co-product. In the framework of the sustainable development of this process, its integration with the CO2 electrochemical conversion can be considered a promising novelty.  According to the literature the valorization of the waste CO2 through electrochemical processes driven by green energy could prompt the economic sustainability of the entire conversion chain of the waste within the circular economy concept. The electrochemical conversion of CO2 has been widely investigated since the 1870s as a promising strategy to convert waste-CO2 into value-added chemicals. Among the emerging technologies for CO2 conversion to value-added products on an applicative scale, electrochemical technologies are the closest to commercialization due to the numerous start-ups and established companies being invested in this area (e.g., Opus-12, Dioxide Material, and Carbon Recycling International) [1]. These technologies have attracted attention due to some unique advantages (including operating at low temperatures, easy scale-up stages, use of excess electric energy from intermittent renewable sources, and small environmental impact). However, to be suitable at an industrial scale, the process should present simultaneously high current densities, faradaic efficiencies, high concentrations, and long-term stability [2,3]. This work aims to show how far the electrochemical technology, using Sn-based cathodes, is from being implemented on an industrial scale and to critically discuss the main strategies to improve the electrosynthesis of formic acid. In addition, formic acid can be also used as a green liquid hydrogen donor in the hydrothermal liquefaction (HTL) of waste organic matrices. Prestigiacomo et al. [4] indicated that formic acid can be an effective additive to improve biocrude yields and quality in the HTL of municipal sludge, that is a very promising result in the perspective of industrial utilization of the process.      [1] O.S. Bushuyev et al. Joule 2018, 2, 825. [2] F. Proietto et al. Electrochim. Acta 2021, 380, 138753. [3] F. Proietto et al. ChemElectroChem 2021, 8, 2169–2179 [4] Prestigiacomo et al. Energy 2021, 232,121086.  

Valorization of CO2-Riched Gaseous to Formic Acid via Electrochemical Routes: Current Status and Perspectives

https://dc.engconfintl.org/cgi/viewcontent.cgi?filename=0&article=1056&context=pyroliq_2023&type=additional

Valorization of CO2-Riched Gaseous to Formic Acid via Electrochemical Routes: Current Status and Perspectives

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Engineering Conferences International