US 11,807,590 B2
Methane production system
Hiroyuki Shinomiya, Osaka (JP); Hiroyuki Takano, Osaka (JP); Koichi Izumiya, Osaka (JP); and Masahiro Yamaki, Osaka (JP)
Assigned to Hitachi Zosen Corporation, Osaka (JP)
Appl. No. 17/439,170
Filed by HITACHI ZOSEN CORPORATION, Osaka (JP)
PCT Filed Feb. 17, 2020, PCT No. PCT/JP2020/005966
§ 371(c)(1), (2) Date Sep. 14, 2021,
PCT Pub. No. WO2020/189127, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-051105 (JP), filed on Mar. 19, 2019.
Prior Publication US 2022/0162139 A1, May 26, 2022
Int. Cl. C07C 1/04 (2006.01); C07C 1/12 (2006.01)
CPC C07C 1/041 (2013.01) [C07C 1/12 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A methane production system comprising:
a reaction tank configured to be supplied with CO and/or CO2 and produce methane and water by reacting CO and/or CO2 with hydrogen;
a cleaning tank that is located at an upstream side of the reaction tank in a supply direction of the CO and/or CO2, the cleaning tank configure to remove water-soluble impurities from a raw material gas including the CO and/or CO2 and the water-soluble impurities by bringing the raw material gas into contact with water;
a first supply line configured to supply the raw material gas from which the water-soluble impurities are removed from the cleaning tank to the reaction tank; and
a second supply line configured to supply water produced in the reaction tank from the reaction tank to the cleaning tank to bring the produced water into contact with the raw material gas in the cleaning tank.