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Title: Experimental design, operation, and results of a 4 kW high temperature steam electrolysis experiment

High temperature steam electrolysis (HTSE) is a promising technology for large-scale hydrogen production. However, research on HTSE performance above the kW level is limited. This paper presents the results of 4 kW HTSE long-term test completed in a multi-kW test facility recently developed at the Idaho National Laboratory (INL). The 4 kW HTSE unit included two solid oxide electrolysis stacks operating in parallel, each of which included 40 electrode-supported planar cells. A current density of 0.41 A/cm2 was used for the long-term operation, resulting in a hydrogen production rate about 25 slpm. A demonstration of 920 hours stable operation was achieved. The paper also includes detailed descriptions of the piping layout, steam generation and delivery system, test fixture, heat recuperation system, hot zone, instrumentation, and operating conditions. As a result, this successful demonstration of multi-kW scale HTSE unit will help to advance the technology toward near-term commercialization.
 [1] ;  [2] ;  [3] ;  [1] ;  [2]
  1. Old Dominion Univ., Norfolk, VA (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  3. Materials and Systems Research, Inc., Salt Lake City, UT (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0378-7753; PII: S0378775315301488
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 297; Journal Issue: C; Journal ID: ISSN 0378-7753
Research Org:
Idaho National Laboratory, Idaho Falls, ID (United States)
Sponsoring Org:
Country of Publication:
United States
08 HYDROGEN; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS high temperature steam electrolysis; solid oxide electrolysis cell; hydrogen production; multi-kW test