US 12,331,417 B1
Methods and systems for the conversion of carbon dioxide to chemicals and/or fuels utilizing steam electrolysis
Zihan Huang, Emeryville, CA (US); and Lin Li, San Ramon, CA (US)
Assigned to CHEVRON U.S.A. INC., San Ramon, CA (US)
Filed by Chevron U.S.A. Inc., San Ramon, CA (US)
Filed on Dec. 13, 2023, as Appl. No. 18/538,342.
Int. Cl. C25B 9/67 (2021.01); B01J 19/00 (2006.01); B01J 19/24 (2006.01); C07C 29/152 (2006.01); C07C 41/01 (2006.01); C25B 1/042 (2021.01); C25B 9/19 (2021.01); C25B 15/08 (2006.01)
CPC C25B 9/67 (2021.01) [B01J 19/0013 (2013.01); B01J 19/245 (2013.01); C07C 29/152 (2013.01); C07C 41/01 (2013.01); C25B 1/042 (2021.01); C25B 9/19 (2021.01); C25B 15/081 (2021.01); B01J 2219/00117 (2013.01); B01J 2219/00157 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
heating a steam feed stream having a temperature of from about 250° C. to about 350° C. received from a reactor unit in a first heat exchanger using an anode effluent from an anode of an electrolyzer comprising an anode, a cathode, and an electrolyte inserted between the anode and the cathode as a heat transfer medium to generate a first heated steam effluent having a temperature of about 350° C. to about 450° C. and a cooled anode effluent;
heating the first heated steam effluent in a second heat exchanger using a cathode effluent from the cathode of the electrolyzer as a heat transfer medium to generate a second heated steam effluent having a temperature of about 550° C. to about 650° C. and a cooled cathode effluent;
combusting, in a combustion unit, a first tail gas stream to transfer heat to the second heated steam effluent to generate a third heated steam effluent having a temperature of about 700° C. to about 950° C.; and
passing the third heated steam effluent to the cathode of the electrolyzer.