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A novel integration of a green power-to-ammonia to power system Reversible solid oxide fuel cell for hydrogen and power production coupled with an ammonia synthesis unit

Abstract

Renewable energy is a key solution in maintaining global warming below 2 °C. However, its intermittency necessitates the need for energy conversion technologies to meet demand when there are insufficient renewable energy resources. This study aims to tackle these challenges by thermo-electrochemical modelling and simulation of a reversible solid oxide fuel cell (RSOFC) and integration with the Haber Bosch process. The novelty of the proposed system is usage of nitrogen-rich fuel electrode exhaust gas for ammonia synthesis during fuel cell mode, which is usually combusted to prevent release of highly flammable hydrogen into the environment. RSOFC round-trip efficiencies of 41–53% have been attained when producing excess ammonia (144 kg NH3/hr) for the market and in-house consumption respectively. The designed system has the lowest reported ammonia electricity consumption of 6.4–8.21 kWh/kg NH3, power-to-hydrogen, power-to-ammonia, and power-generation efficiencies of 80%, 55–71% and, 64–66%.

Funding source: Commonwealth Scholarship Commission in the UK and British Council Newton-institutional links project (GA No:332427068).
Related subjects: Applications & Pathways
Countries: United Kingdom
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/content/journal2122
2021-03-31
2021-06-23
http://instance.metastore.ingenta.com/content/journal2122
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