Green ammonia production via the integration of a solid oxide electrolyser and a Haber-Bosch loop with a series of solid electrolyte oxygen pumps

Duncan A. Nowicki*, Gerald Agnew, John Thomas Sirr Irvine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
25 Downloads (Pure)

Abstract

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.
Original languageEnglish
Article number116816
Number of pages10
JournalEnergy Conversion and Management
Volume280
Early online date19 Feb 2023
DOIs
Publication statusPublished - 15 Mar 2023

Keywords

  • Solid oxide electrolysis
  • Ammonia
  • Solid electrolyte oxygen pump
  • Hydrogen

Fingerprint

Dive into the research topics of 'Green ammonia production via the integration of a solid oxide electrolyser and a Haber-Bosch loop with a series of solid electrolyte oxygen pumps'. Together they form a unique fingerprint.

Cite this