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High Temperature Steam Electrolysis: Demonstration of Improved Long-Term Performance

Description: Long-term performance is an ongoing issue for hydrogen production based on high-temperature steam electrolysis (HTSE). For commercial deployment, solid-oxide electrolysis stacks must achieve high performance with long-term degradation rates of {approx}0.5%/1000 hours or lower. Significant progress has been achieved toward this goal over the past few years. This paper will provide details of progress achieved under the Idaho National Laboratory high temperature electrolysis research program. Rec… more
Date: November 1, 2011
Creator: O'Brien, J. E.; Zhang, X.; O'Brien, R. C. & Tao, G.
Partner: UNT Libraries Government Documents Department
open access

High Temperature Electrolysis 4 kW Experiment Design, Operation, and Results

Description: This report provides results of long-term stack testing completed in the new high-temperature steam electrolysis multi-kW test facility recently developed at INL. The report includes detailed descriptions of the piping layout, steam generation and delivery system, test fixture, heat recuperation system, hot zone, instrumentation, and operating conditions. This facility has provided a demonstration of high-temperature steam electrolysis operation at the 4 kW scale with advanced cell and stack te… more
Date: September 1, 2012
Creator: O'Brien, J.E.; Zhang, X.; DeWall, K.; Moore-McAteer, L. & Tao, G.
Partner: UNT Libraries Government Documents Department
open access

4 kW Test of Solid Oxide Electrolysis Stacks with Advanced Electrode-Supported Cells

Description: A new test stand has been developed at the Idaho National Laboratory for multi-kW testing of solid oxide electrolysis stacks. This test stand will initially be operated at the 4 KW scale. The 4 kW tests will include two 60-cell stacks operating in parallel in a single hot zone. The stacks are internally manifolded with an inverted-U flow pattern and an active area of 100 cm2 per cell. Process gases to and from the two stacks are distributed from common inlet/outlet tubing using a custom base ma… more
Date: June 1, 2012
Creator: O'Brien, J. E.; Zhang, X.; Housley, G. K.; Moore-McAteer, L. & Tao, G.
Partner: UNT Libraries Government Documents Department
open access

LONG-TERM PERFORMANCE OF SOLID OXIDE STACKS WITH ELECTRODE-SUPPORTED CELLS OPERATING IN THE STEAM ELECTROLYSIS MODE

Description: Performance characterization and durability testing have been completed on two five-cell high-temperature electrolysis stacks constructed with advanced cell and stack technologies. The solid oxide cells incorporate a negative-electrode-supported multi-layer design with nickel-zirconia cermet negative electrodes, thin-film yttria-stabilized zirconia electrolytes, and multi-layer lanthanum ferrite-based positive electrodes. The per-cell active area is 100 cm2. The stack is internally manifolded w… more
Date: November 1, 2011
Creator: O'Brien, J. E.; O'Brien, R. C.; Zhang, X.; Tao, G. & Butler, B. J.
Partner: UNT Libraries Government Documents Department
open access

Pressurized Testing of Solid Oxide Electrolysis Stacks with Advanced Electrode-Supported Cells

Description: A new facility has been developed at the Idaho National Laboratory for pressurized testing of solid oxide electrolysis stacks. Pressurized operation is envisioned for large-scale hydrogen production plants, yielding higher overall efficiencies when the hydrogen product is to be delivered at elevated pressure for tank storage or pipelines. Pressurized operation also supports higher mass flow rates of the process gases with smaller components. The test stand can accommodate cell dimensions up to … more
Date: June 1, 2012
Creator: O'Brien, J. E.; Zhang, X.; Housley, G. K.; DeWall, K.; Moore-McAteer, L. & Tao, G.
Partner: UNT Libraries Government Documents Department
open access

RECENT ADVANCES IN HIGH TEMPERATURE ELECTROLYSIS AT IDAHO NATIONAL LABORATORY: STACK TESTS

Description: High temperature steam electrolysis is a promising technology for efficient sustainable large-scale hydrogen production. Solid oxide electrolysis cells (SOECs) are able to utilize high temperature heat and electric power from advanced high-temperature nuclear reactors or renewable sources to generate carbon-free hydrogen at large scale. However, long term durability of SOECs needs to be improved significantly before commercialization of this technology. A degradation rate of 1%/khr or lower is … more
Date: July 1, 2012
Creator: X, Zhang; O'Brien, J. E.; O'Brien, R. C.; Hartvigsen, J. J.; Tao, G. & Petigny, N.
Partner: UNT Libraries Government Documents Department
open access

Advanced Cell Development and Degradation Studies

Description: The Idaho National Laboratory (INL) has been researching the application of solid-oxide electrolysis cells for large-scale hydrogen production from steam over a temperature range of 800 to 900ºC. From 2003 – 2009, this work was sponsored by the DOE Nuclear Hydrogen Initiative (NHI). Starting in 2010, the HTE research program has been sponsored by the Next Generation Nuclear Plant (NGNP) program. HTSE research priorities in FY10 are centered on understanding and reducing cell and stack performan… more
Date: September 1, 2010
Creator: O'Brien, J. E.; Stoots, C. M.; Herring, J. S.; O'Brien, R. C.; Condie, K. G.; Sohal, M. et al.
Partner: UNT Libraries Government Documents Department
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