Green ammonia production via the integration of a solid oxide electrolyser and a Haber-Bosch loop with a series of solid electrolyte oxygen pumps
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A conceptual design for a small-scale green ammonia plant is presented in which ammonia synthesis was realised via a Haber-Bosch loop using hydrogen produced by a solid oxide electrolyser and nitrogen purified from air with a series of solid electrolyte oxygen pumps. The system operated with an energetic efficiency of 52.12%, very close to a cryogenic ASU reference system where an efficiency of 52.89% was achieved. The specific energy consumption was 9.94 kWh/kgNH3. Whilst these were encouraging results, opportunities exist to improve system design further. For example, greater heat integration could allow for steam required by the electrolyser to be raised using waste heat from the series of oxygen pumps.
Nowicki , D A , Agnew , G & Irvine , J T S 2023 , ' Green ammonia production via the integration of a solid oxide electrolyser and a Haber-Bosch loop with a series of solid electrolyte oxygen pumps ' , Energy Conversion and Management , vol. 280 , 116816 . https://doi.org/10.1016/j.enconman.2023.116816
Energy Conversion and Management
Copyright © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
DescriptionFunding: Financial support from the University of St Andrews and the Hydrogen and Fuel Cells Hub Extension (H2FC SUPERGEN) flexible funding (EP/P024807/1). John T.S. Irvine reports financial support was provided by Hydrogen and Fuel Cells Hub Extension (H2FC SUPERGEN).
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