US 12,434,226 B2
Reducing agent and method for producing gas
Koji Takizawa, Ibaraki (JP); Fiona Mukherjee, Ibaraki (JP); Kenichi Shinmei, Tsukuba (JP); Noritoshi Yagihashi, Ibaraki (JP); and Risa Sakurai, Ibaraki (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 17/914,042
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Mar. 3, 2021, PCT No. PCT/JP2021/008250
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2021/192871, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-054283 (JP), filed on Mar. 25, 2020; application No. 2020-054284 (JP), filed on Mar. 25, 2020; and application No. 2020-159850 (JP), filed on Sep. 24, 2020.
Prior Publication US 2023/0330635 A1, Oct. 19, 2023
Int. Cl. B01J 23/10 (2006.01); B01J 23/745 (2006.01); B01J 23/92 (2006.01); B01J 38/10 (2006.01); C01B 32/40 (2017.01); C01F 17/32 (2020.01)
CPC B01J 23/10 (2013.01) [B01J 23/745 (2013.01); B01J 23/92 (2013.01); B01J 38/10 (2013.01); C01B 32/40 (2017.08); C01F 17/32 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A reducing agent for use in production of a product gas containing carbon monoxide, the reducing agent being brought into contact with a raw material gas containing carbon dioxide to reduce the carbon dioxide to produce the product gas,
the reducing agent comprising:
a composite metal oxide represented by Ce1-x(M)xOy, where M is a metal element with an ionic radius smaller than an ionic radius of Ce with an identical valence number and an identical coordination number, x represents a positive real number, and y represents a real number from 1 to 4, and
a support supporting the composite metal oxide, the support having oxygen ionic conductivity and having a function as an oxygen carrier, wherein the support comprises at least one selected from the group consisting of vanadium (V), manganese (Mn), molybdenum (Mo), yttrium (Y), chromium (Cr), lanthanum (La), cobalt (Co), nickel (Ni), copper (Cu), tungsten (W), and niobium (Nb).