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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

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posted on 2022-01-17, 09:22 authored by Mulako MukelabaiMulako Mukelabai, Jonathon M Gillard, Kumar Patchigolla
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

Commonwealth Scholarship Commission in the UK and British Council Newton-institutional links project (GA No:332427068)

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Hydrogen Energy

Volume

46

Issue

35

Pages

18546 - 18556

Publisher

Elsevier BV

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

2021-02-28

Publication date

2021-03-31

Copyright date

2021

ISSN

0360-3199

Language

  • en

Depositor

Mulako Mukelabai. Deposit date: 14 January 2022

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