Achieving high-efficiency hydrogen production using planar solid-oxide electrolysis stacks |
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Authors: | Qingshan Li Yifeng ZhengWanbing Guan Le JinCheng Xu Wei Guo Wang |
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Affiliation: | Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, PR China |
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Abstract: | Steam electrolysis in solid oxide electrolysis cells (SOECs) is considered as an effective method to achieve high-efficiency hydrogen production. In the present investigation, samples of 1-cell, 2-cell and 30-cell SOEC stacks were tested under electrolysis of steam to give a practical evaluation of the SOEC system efficiency of hydrogen production. The samples were tested at 800 °C under various operating conditions up to 500 h without significant degradation, and obtained steam conversion rates of 12.4%, 23% and 82.2% for the 1-cell, 2-cell and 30-cell stacks, respectively. System efficiencies of hydrogen production were calculated for the samples based on their real performance. A maximum efficiency value of 52.7% was achieved in the 30-cell stack. |
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Keywords: | Solid oxide electrolysis cell Hydrogen production System efficiency High-temperature electrolysis |
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