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Title: Wet-air co-electrolysis in high-temperature solid oxide electrolysis cell for production of ammonia feedstock
Authors: Liu, Qinglin
Su, Pei-Chen
Chan, Siew Hwa
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Liu, Q., Su, P. & Chan, S. H. (2022). Wet-air co-electrolysis in high-temperature solid oxide electrolysis cell for production of ammonia feedstock. International Journal of Hydrogen Energy, 47(43), 18577-18586.
Project: 2021-T1-001-091
Journal: International Journal of Hydrogen Energy
Abstract: To significantly abate the carbon footprint in the conventional Haber-Bosch process, a novel approach based on wet air co-electrolysis in solid oxide electrolysis cell (SOEC) was proposed and evaluated in this study for sustainable single-step production of ammonia feedstock (i.e., H2/N2 mixture). An electrolyte-supported SOEC composed of LSCM-GDC cathode, SSZ electrolyte and LSCF-GDC anode was prepared and tested under various operation conditions. The current-voltage responses measured for wet air co-electrolysis were featured with three different regions which could be attributed to competitive and combinative effects of oxygen splitting reaction and water splitting reaction under wet air co-electrolysis operation. Gas chromatography (GC) analysis of the exit gas from the cathode chamber proved that high purity H2/N2 mixture had been produced successfully through the novel wet air co-electrolysis process. However, the obtained H2:N2 ratios were still much lower than the desired 3:1 ratio in the ammonia feedstock for the Haber-Bosch process. Further explorations will be made to increase the H2:N2 ratio in the produced gas mixture.
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2022.04.017
Rights: © 2022 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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