US 12,270,113 B2
Fuel producing system
Masahiro Mohri, Saitama (JP); Kazuki Yanagisawa, Saitama (JP); and Misato Maki, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Feb. 25, 2022, as Appl. No. 17/680,322.
Claims priority of application No. 2021-060700 (JP), filed on Mar. 31, 2021.
Prior Publication US 2022/0316077 A1, Oct. 6, 2022
Int. Cl. C25B 1/042 (2021.01); C07C 1/04 (2006.01); C25B 1/23 (2021.01); C25B 15/08 (2006.01)
CPC C25B 1/042 (2021.01) [C07C 1/0425 (2013.01); C25B 1/23 (2021.01); C25B 15/087 (2021.01)] 5 Claims
OG exemplary drawing
 
1. A fuel producing system comprising:
a raw material gas concentrator that is supplied with a raw material containing carbon dioxide and water and removes impurities contained in the raw material;
a heat exchanger that heat-exchanges the raw material supplied to the raw material gas concentrator with water from the raw material gas concentrator to heat the water from the raw material gas concentrator;
a vapor generator that changes water heated by the heat exchanger that heats the water from the raw material gas concentrator, into water vapor;
an electrolyzer that is supplied with a raw material gas containing carbon dioxide from the raw material gas concentrator and water vapor from the vapor generator, and electrolyzes the raw material gas to generate a product gas containing hydrogen and carbon monoxide;
a first gas-liquid separator that performs gas-liquid separation on the product gas generated in the electrolyzer, to divide the product gas into a gas containing hydrogen and carbon monoxide and water that has not reacted in the electrolyzer;
a heat exchanger that heat-exchanges water vapor supplied from the vapor generator to the electrolyzer with the product gas from the electrolyzer to heat the water vapor supplied from the vapor generator;
a synthesizer that generates a synthesis gas by passing, through a catalyst the product gas from which water has been separated in the first gas-liquid separator, the synthesis gas containing methane;
a second gas-liquid separator that performs gas-liquid separation on the synthesis gas generated in the synthesizer to divide the synthesis gas into a synthesis gas containing methane and water separated from the synthesis gas; and
an injector that injects water separated in the first gas-liquid separator and water separated in the second gas-liquid separator into, and mixes them with, water vapor heated by the heat exchanger that heats water vapor supplied from the vapor generator to the electrolyzer
wherein water vapor produced from water separated in the first gas-liquid separator and injected by the injector and water vapor produced from water separated in the second gas-liquid separator and injected by the injector, or water vapor produced from water from a water supply source are/is allowed to be supplied to the electrolyzer in addition to the raw material gas.