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All-vanadium dual circuit redox flow battery for renewable hydrogen generation and desulfurisation

Research output: Contribution to journalJournal articlepeer-review

Published
  • Pekka Peljo
  • Heron Vrubel
  • Veronique Amstutz
  • Justine Pandard
  • Joana Morgado
  • Annukka Santasalo-Aarnio
  • David Lloyd
  • Frederic Gumy
  • C. R. Dennison
  • Kathryn Ellen Toghill
  • Hubert H. Girault
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<mark>Journal publication date</mark>21/03/2016
<mark>Journal</mark>Green Chemistry
Issue number6
Volume18
Number of pages13
Pages (from-to)1785-1797
Publication StatusPublished
Early online date9/11/15
<mark>Original language</mark>English

Abstract

An all-vanadium dual circuit redox flow battery is an electrochemical energy storage system able to function as a conventional battery, but also to produce hydrogen and perform desulfurization when a surplus of electricity is available by chemical discharge of the battery electrolytes. The hydrogen reactor chemically discharging the negative electrolyte has been designed and scaled up to kW scale, while different options to discharge the positive electrolyte have been evaluated, including oxidation of hydrazine, SO2 and H2S. The system is well suited to convert sulfur dioxide and hydrogen sulfide to harmless compounds while producing hydrogen, with overall system efficiencies from 50 to 70% for hydrogen production.