US 11,905,608 B2
Fuel production system
Hiroshi Chishima, Wako (JP)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by Honda Motor Co., Ltd., Tokyo (JP)
Filed on Jun. 3, 2022, as Appl. No. 17/831,674.
Claims priority of application No. 2021-094872 (JP), filed on Jun. 7, 2021.
Prior Publication US 2022/0401909 A1, Dec. 22, 2022
Int. Cl. C07C 29/151 (2006.01); C07C 31/04 (2006.01); C25B 15/02 (2021.01); C25B 15/08 (2006.01); C25B 1/04 (2021.01); B01J 19/00 (2006.01); B01J 19/24 (2006.01)
CPC C25B 15/02 (2013.01) [C07C 29/1518 (2013.01); C25B 1/04 (2013.01); C25B 15/081 (2021.01); B01J 19/004 (2013.01); B01J 19/245 (2013.01); B01J 2219/0004 (2013.01); C10J 2300/1665 (2013.01); C10J 2300/1684 (2013.01); Y02E 60/36 (2013.01); Y02P 20/133 (2015.11)] 5 Claims
OG exemplary drawing
 
1. A fuel production system, comprising:
a synthesis gas generation unit configured to generate synthesis gas containing hydrogen and carbon monoxide from carbon-containing raw material;
a fuel production unit configured to produce fuel from the synthesis gas generated by the synthesis gas generation unit;
a water electrolyzer configured to electrolyze water to generate water-electrolyzed hydrogen;
a hydrogen supply unit configured to supply the water-electrolyzed hydrogen generated by the water electrolyzer to the synthesis gas generation unit; and
a controller including an arithmetic unit and a storage unit, wherein
the controller is configured to perform:
calculating an input energy based on a first energy possessed by the carbon-containing raw material, a second energy consumed by the water electrolyzer when generating the water-electrolyzed hydrogen, a third energy consumed by the synthesis gas generation unit when generating the synthesis gas, and a fourth energy consumed by the fuel production unit when producing the fuel;
calculating a recovered energy based on a fifth energy possessed by the fuel produced by the fuel production unit;
monitoring whether an electrolysis efficiency of the water electrolyzer is equal to or higher than a predetermined electrolysis efficiency in which a ratio of the recovered energy to the input energy increases as compared with a case where the water-electrolyzed hydrogen is not generated and supplied; and
controlling the water electrolyzer so as to generate the water-electrolyzed hydrogen when the electrolysis efficiency is equal to or higher than the predetermined electrolysis efficiency.