US 11,787,753 B2
Methane production apparatus, methane production method, carbon dioxide recovery apparatus, and carbon dioxide recovery method
Yoshio Matsuzaki, Tokyo (JP); Yoshitaka Baba, Tokyo (JP); Koki Sato, Tokyo (JP); Hiroki Iinuma, Tokyo (JP); and Junichiro Otomo, Tokyo (JP)
Assigned to TOKYO GAS CO., LTD., Tokyo (JP); and THE UNIVERSITY OF TOKYO, Tokyo (JP)
Appl. No. 17/624,733
Filed by TOKYO GAS CO., LTD., Tokyo (JP); and THE UNIVERSITY OF TOKYO, Tokyo (JP)
PCT Filed Jul. 14, 2020, PCT No. PCT/JP2020/027358
§ 371(c)(1), (2) Date Jan. 4, 2022,
PCT Pub. No. WO2021/015056, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 2019-133519 (JP), filed on Jul. 19, 2019.
Prior Publication US 2022/0204422 A1, Jun. 30, 2022
Int. Cl. C07C 1/12 (2006.01); B01J 20/04 (2006.01); B01J 23/755 (2006.01); B01D 53/62 (2006.01); B01D 53/81 (2006.01)
CPC C07C 1/12 (2013.01) [B01D 53/62 (2013.01); B01D 53/81 (2013.01); B01J 20/043 (2013.01); B01J 23/755 (2013.01); B01D 2251/306 (2013.01); B01D 2251/604 (2013.01); B01D 2251/606 (2013.01); B01D 2257/504 (2013.01); B01D 2257/80 (2013.01); B01J 2220/42 (2013.01); C07C 2523/755 (2013.01)] 3 Claims
 
1. A methane production system comprising an apparatus and reactants contained therein which are undergoing a gas-solid reaction, wherein the apparatus comprises:
a holding unit which has a main body, an absorbent material that is supported by the main body, and a catalyst that is supported by the main body; and
a hydrogen supply unit configured to supply hydrogen to the holding unit to produce methane,
wherein the absorbent material includes potassium bicarbonate, and the catalyst is a nickel-based catalyst,
wherein the reaction takes place in the holding unit and is a gas-solid reaction,
wherein the apparatus further comprises a gas-to-be-treated supply unit configured to supply a gas to be treated to the holding unit to absorb carbon dioxide contained in the gas to be treated into the absorbent material,
wherein the apparatus is configured to supply the hydrogen to the holding unit at a different time than the gas to be treated is supplied to the holding unit, and
wherein the methane production apparatus further comprises a central control unit that controls the hydrogen supply unit and the gas-to-be-treated supply unit, wherein the central control unit is configured to supply hydrogen to the holding unit at different times than the gas to be treated is supplied to the holding unit.