US 12,188,138 B1
Electrochemical carbon oxides reduction to ethylene
Moritz Wilhelm Schreiber, Seneffe (BE); Hong-Phong Duong, Paris (FR); Ngoc Huan Tran, Paris (FR); and Marc Fontecave, Paris (FR)
Assigned to TOTALENERGIES ONETECH, Courbevoie (FR); and COLLÈGE DE FRANCE, Paris (FR)
Appl. No. 18/723,935
Filed by TOTALENERGIES ONETECH, Courbevoie (FR); and COLLÈGE DE FRANCE, Paris (FR)
PCT Filed Jan. 3, 2023, PCT No. PCT/EP2023/050055
§ 371(c)(1), (2) Date Jun. 25, 2024,
PCT Pub. No. WO2023/131604, PCT Pub. Date Jul. 13, 2023.
Claims priority of application No. 22315009 (EP), filed on Jan. 10, 2022; and application No. 22182561 (EP), filed on Jul. 1, 2022.
Int. Cl. C25B 3/03 (2021.01); C23C 8/10 (2006.01); C23C 28/00 (2006.01); C25B 1/23 (2021.01); C25B 3/25 (2021.01); C25B 3/26 (2021.01); C25B 9/19 (2021.01); C25B 9/23 (2021.01); C25B 11/032 (2021.01); C25B 11/052 (2021.01); C25B 11/061 (2021.01); C25B 11/075 (2021.01); C25D 3/38 (2006.01); C25D 5/50 (2006.01)
CPC C25B 3/03 (2021.01) [C23C 8/10 (2013.01); C23C 28/32 (2013.01); C23C 28/345 (2013.01); C25B 1/23 (2021.01); C25B 3/25 (2021.01); C25B 3/26 (2021.01); C25B 9/19 (2021.01); C25B 9/23 (2021.01); C25B 11/032 (2021.01); C25B 11/052 (2021.01); C25B 11/061 (2021.01); C25B 11/075 (2021.01); C25D 3/38 (2013.01); C25D 5/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Process for electrolysing one or more carbon oxides into one or more hydrocarbons characterized in that it comprises the following steps:
b) preparing a cathode catalyst by electrodeposition of Cu on a Cu electrode from an acidic CuSO4 solution;
c) providing an electrolyser comprising a gas diffusion cathode, an anode and an ion-exchange membrane in between said gas diffusion cathode and said anode, wherein the electrolyser is selected from a zero-gap electrolyser, a two-gaps electrolyser, a catholyte-free one-gap electrolyser and a catholyte-containing one-gap electrolyser, and wherein the ion-exchange membrane is an anion-exchange membrane or a bipolar membrane;
d) providing an input flow at the gas diffusion cathode, the input flow comprising one or more carbon oxides selected from carbon monoxide or a mixture of carbon monoxide and carbon dioxide;
e) providing an anolyte solution at the anode and optionally a catholyte solution at the gas diffusion cathode;
f) applying an electric current between the gas diffusion cathode and the anode; and
g) recovering, at the gas diffusion cathode, an output flow comprising one or more hydrocarbons comprising ethylene;
and in that step (b) of preparing a cathode catalyst by electrodeposition of Cu comprises a calcination sub-step performed at a temperature of at least 300° C. to obtain a dendritic copper oxide catalyst and the electrolyser provided at step (c) further comprises a first interface in between the gas diffusion cathode and the ion-exchange membrane, wherein the first interface comprises a cathode catalyst being a dendritic copper oxide catalyst.