US 12,341,229 B2
Solid oxide fuel cell system with hydrogen pumping cell with carbon monoxide tolerant anodes and integrated shift reactor
Chockkalingam Karuppaiah, San Jose, CA (US); Michael Gasda, San Jose, CA (US); Arne Ballantine, San Jose, CA (US); Martin Perry, San Jose, CA (US); Andy Ta, San Jose, CA (US); Kyle Kekelis, San Jose, CA (US); and Srikanth Ranganathan, San Jose, CA (US)
Assigned to BLOOM ENERGY CORPORATION, San Jose, CA (US)
Filed by Bloom Energy Corporation, San Jose, CA (US)
Filed on Mar. 27, 2023, as Appl. No. 18/126,604.
Application 18/126,604 is a continuation of application No. 16/790,269, filed on Feb. 13, 2020, granted, now 11,616,249.
Claims priority of provisional application 62/822,198, filed on Mar. 22, 2019.
Prior Publication US 2023/0231172 A1, Jul. 20, 2023
Int. Cl. H01M 8/241 (2016.01); C01B 3/16 (2006.01); C01B 3/38 (2006.01); C01B 3/50 (2006.01); H01M 4/90 (2006.01); H01M 8/04007 (2016.01); H01M 8/04089 (2016.01); H01M 8/04119 (2016.01); H01M 8/0612 (2016.01); H01M 8/0662 (2016.01); H01M 8/0668 (2016.01)
CPC H01M 8/241 (2013.01) [C01B 3/16 (2013.01); C01B 3/38 (2013.01); C01B 3/50 (2013.01); H01M 4/9041 (2013.01); H01M 8/04074 (2013.01); H01M 8/04097 (2013.01); H01M 8/04164 (2013.01); H01M 8/0668 (2013.01); H01M 8/0681 (2013.01); C01B 2203/066 (2013.01); H01M 8/04141 (2013.01); H01M 8/0618 (2013.01); Y02E 60/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a fuel cell system, comprising:
providing a fuel inlet stream to a fuel inlet of a fuel cell stack;
providing a fuel exhaust from a fuel exhaust outlet of the fuel cell stack to a splitter;
providing a first portion of the fuel exhaust from the splitter to an air preheater heat exchanger that preheats air provided to the fuel cell stack using the first portion of the fuel exhaust, the air preheater heat exchanger comprising a first water-gas shift (WGS) catalyst that is coated on a conduit of the air preheater heat exchanger that carries the first portion of the fuel exhaust;
providing the first portion of the fuel exhaust from an outlet of the air preheater heat exchanger to an anode inlet of an electrochemical pump separator comprising an electrolyte, a cathode, and an anode, and to a second WGS catalyst that is operatively connected to or integrated with the electrochemical pump separator;
providing a second portion of the fuel exhaust from the splitter to an anode tail gas oxidizer (ATO);
providing hydrogen output from a cathode outlet of the electrochemical pump separator to the fuel inlet stream; and
oxidizing separator exhaust output from an anode outlet of the electrochemical pump separator, the second portion of the fuel exhaust output from the splitter, and cathode exhaust output from the fuel cell stack in the ATO.