US 11,965,254 B2
Manufacturing apparatus and manufacturing method for synthetic gas with controlled H2/CO ratio
Jaeyoung Lee, Gwangju (KR); Minjun Choi, Gwangju (KR); Jin Won Kim, Gwangju (KR); Sungyool Bong, Gwangju (KR); Youjin Lee, Gwangju (KR); and Sunki Chung, Gwangju (KR)
Assigned to GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, (KR)
Filed by GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, Gwangju (KR)
Filed on Jul. 22, 2022, as Appl. No. 17/871,783.
Claims priority of application No. 10-2021-0129383 (KR), filed on Sep. 30, 2021; and application No. 10-2022-0032182 (KR), filed on Mar. 15, 2022.
Prior Publication US 2023/0102211 A1, Mar. 30, 2023
Int. Cl. C25B 1/23 (2021.01); C25B 9/19 (2021.01); C25B 11/032 (2021.01); C25B 11/052 (2021.01); C25B 11/081 (2021.01); C25B 15/08 (2006.01)
CPC C25B 1/23 (2021.01) [C25B 9/19 (2021.01); C25B 11/032 (2021.01); C25B 11/052 (2021.01); C25B 11/081 (2021.01); C25B 15/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A low-power electrochemical apparatus for producing a synthetic gas, comprising:
a cathode unit, which comprises a first supply unit for supplying a carbon dioxide-containing reduction fuel, a cathode for reducing the carbon dioxide, a catholyte spacer in contact with the cathode and containing a catholyte, and a first outlet located at one end of the catholyte spacer and discharging a H2/CO synthetic gas containing H2 and CO by reducing the carbon dioxide-containing reduction fuel;
an anode unit, which comprises a second supply unit for supplying an oxidation fuel containing a nitrogen compound, an anode for oxidizing the nitrogen compound, an anolyte spacer in contact with the anode and containing an anolyte, and a second outlet located at one end of the anolyte spacer and discharging a nitrogen compound-containing oxidation product;
an ion exchange unit, which comprises an ion exchange membrane, interposed between the catholyte spacer and the anolyte spacer; and
a power unit for applying a constant current to the cathode and the anode,
wherein the cathode and the anode are gas diffusion electrodes comprising a catalyst layer,
wherein the catalyst layer of the cathode is Au,
wherein the catalyst layer of the anode is Pt,
wherein the power unit adjusts a current density of the constant current in a range of 1 mA cm−2 to 10 A cm−2 to control a H2/CO ratio of the synthetic gas in a range of 0.25 to 30, and as the current density of the constant current increases, the H2 ratio in the discharged H2/CO synthetic gas increases.