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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.
Authors:
 [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:
1245831
Report Number(s):
INL/JOU--15-34249
Journal ID: ISSN 0378-7753; PII: S0378775315301488
Grant/Contract Number:
AC07-05ID14517
Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 297; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Research Org:
Idaho National Laboratory, Idaho Falls, ID (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS high temperature steam electrolysis; solid oxide electrolysis cell; hydrogen production; multi-kW test