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

Pekka Peljo, Heron Vrubel, Veronique Amstutz, Justine Pandard, Joana Morgado, Annukka Santasalo-Aarnio, David Lloyd, Frederic Gumy, C. R. Dennison, Kathryn E. Toghill, Hubert H. Girault*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1785-1797
Number of pages13
JournalGreen Chemistry
Volume18
Issue number6
DOIs
Publication statusPublished - 21 Mar 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • BIPHASIC LIQUID-SYSTEMS
  • ELECTROCHEMICAL STABILITY
  • EVOLUTION REACTION
  • MOLYBDENUM BORIDE
  • ENERGY-STORAGE
  • SULFUR CYCLE
  • CATALYSTS
  • CARBIDE
  • ELECTROLYSIS
  • MO2C

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