US 12,391,547 B2
Continuous process for sustainable production of hydrogen
Bahman Amini Horri, Guildford (GB); and Sai Gu, Guildford (GB)
Assigned to UNIVERSITY OF SURREY, Guildford (GB)
Appl. No. 17/260,991
Filed by UNIVERSITY OF SURREY, Guildford (GB)
PCT Filed Jul. 18, 2019, PCT No. PCT/GB2019/052002
§ 371(c)(1), (2) Date Jan. 15, 2021,
PCT Pub. No. WO2020/016580, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 1811785 (GB), filed on Jul. 19, 2018.
Prior Publication US 2021/0261407 A1, Aug. 26, 2021
Int. Cl. C01B 3/10 (2006.01); B01J 19/24 (2006.01); C01G 9/02 (2006.01); C25B 1/04 (2021.01); C25B 9/17 (2021.01); C25C 1/14 (2006.01); C25C 1/16 (2006.01); C25C 7/00 (2006.01)
CPC C01B 3/105 (2013.01) [B01J 19/2465 (2013.01); C01G 9/02 (2013.01); C25B 1/04 (2013.01); C25B 9/17 (2021.01); C25C 1/14 (2013.01); C25C 1/16 (2013.01); C25C 7/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of producing hydrogen, the method comprising:
conducting a thermochemical reaction by contacting zinc or tin, or an alloy thereof, wherein the zinc or tin, or the alloy thereof, is a solid; with steam to produce zinc oxide and/or zinc hydroxide or tin oxide and/or tin hydroxide and hydrogen;
contacting the zinc oxide and/or zinc hydroxide or the tin oxide and/or tin hydroxide produced in the thermochemical reaction with water or a basic aqueous solution to produce a solution comprising a zinc ion or a tin ion; and
conducting an electrochemical reaction by applying a voltage across an anode and a cathode, wherein the voltage is applied by a power supply and whereby at least a portion of the cathode contacts the solution comprising the zinc ion or the tin ion, to simultaneously produce hydrogen and the zinc or tin, or the alloy thereof at the cathode and to produce oxygen at the anode.