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Durable SOC stacks for production of hydrogen and synthesis gas by high temperature electrolysis

✍ Scribed by Sune Dalgaard Ebbesen; Jens Høgh; Karsten Agersted Nielsen; Jens Ulrik Nielsen; Mogens Mogensen

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
659 KB
Volume
36
Category
Article
ISSN
0360-3199

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✦ Synopsis

Electrolysis of steam and co-electrolysis of steam and carbon dioxide was studied in Solid Oxide Electrolysis Cell (SOEC) stacks composed of Ni/YSZ electrode supported SOECs. The results of this study show that long-term electrolysis is feasible without notable degradation in these SOEC stacks. The degradation of the electrolysis cells was found to be influenced by the adsorption of impurities from the applied inlet gases, whereas the application of chromium containing interconnect plates and glass sealings do not seem to influence the durability when operated at 850 C. Cleaning the inlet gases to the Ni/YSZ electrode resulted in operation without long-term degradation, and may therefore be a solution for operating these Ni/YSZ based SOEC stacks without degradation.

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