We propose and demonstrate an integrated electrified plasma-assisted chemical looping (PACL) process that yields supra-equilibrium CO2 conversions unattainable with conventional catalysis at temperatures ≪3000 K. CO2 is first dissociated inside plasma into CO/O at supra-equilibrium conversions (up to 60%) at a bulk gas temperature of 773 K and a 403 kJ/mol energy cost. Supra-equilibrium CO2 conversions (29% on average) are achieved at the reactor outlet by placing a nanostructured CeO2/Fe2O3 oxygen scavenger, prereduced by H2 plasma, downstream of the plasma zone, to capture produced oxygen species and suppress CO/O recombination. Without plasma-material synergy, such an average CO2 conversion can only be attained at temperatures ≥ 2775 K, according to chemical equilibrium calculations. This concept of plasma-assisted chemical looping allows reaching 3-fold higher conversions than state-of-the-art plasma technologies.

Exceeding Equilibrium CO2 Conversion by Plasma-Assisted Chemical Looping / Delikonstantis, Evangelos; Scapinello, Marco; Singh, Varun; Poelman, Hilde; Montesano, Cesare; Martini, Luca Matteo; Tosi, Paolo; Marin, Guy B.; Van Geem, Kevin M.; Galvita, Vladimir V.; Stefanidis, Georgios D.. - In: ACS ENERGY LETTERS. - ISSN 2380-8195. - STAMPA. - 2022:(2022), pp. 1896-1902. [10.1021/acsenergylett.2c00632]

Exceeding Equilibrium CO2 Conversion by Plasma-Assisted Chemical Looping

Scapinello, Marco;Montesano, Cesare;Martini, Luca Matteo;Tosi, Paolo;
2022-01-01

Abstract

We propose and demonstrate an integrated electrified plasma-assisted chemical looping (PACL) process that yields supra-equilibrium CO2 conversions unattainable with conventional catalysis at temperatures ≪3000 K. CO2 is first dissociated inside plasma into CO/O at supra-equilibrium conversions (up to 60%) at a bulk gas temperature of 773 K and a 403 kJ/mol energy cost. Supra-equilibrium CO2 conversions (29% on average) are achieved at the reactor outlet by placing a nanostructured CeO2/Fe2O3 oxygen scavenger, prereduced by H2 plasma, downstream of the plasma zone, to capture produced oxygen species and suppress CO/O recombination. Without plasma-material synergy, such an average CO2 conversion can only be attained at temperatures ≥ 2775 K, according to chemical equilibrium calculations. This concept of plasma-assisted chemical looping allows reaching 3-fold higher conversions than state-of-the-art plasma technologies.
2022
Delikonstantis, Evangelos; Scapinello, Marco; Singh, Varun; Poelman, Hilde; Montesano, Cesare; Martini, Luca Matteo; Tosi, Paolo; Marin, Guy B.; Van Geem, Kevin M.; Galvita, Vladimir V.; Stefanidis, Georgios D.
Exceeding Equilibrium CO2 Conversion by Plasma-Assisted Chemical Looping / Delikonstantis, Evangelos; Scapinello, Marco; Singh, Varun; Poelman, Hilde; Montesano, Cesare; Martini, Luca Matteo; Tosi, Paolo; Marin, Guy B.; Van Geem, Kevin M.; Galvita, Vladimir V.; Stefanidis, Georgios D.. - In: ACS ENERGY LETTERS. - ISSN 2380-8195. - STAMPA. - 2022:(2022), pp. 1896-1902. [10.1021/acsenergylett.2c00632]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/343132
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