Power-to-X electroscrubbing parameter analysis for biogas desulfurization

Sebastian Borgquist*, Sebastian Nis Bay Villadsen, Christina Skitsi, Katrine Boesgaard, Jens Abildskov, Rodrigo Rivera-Tinoco, Jan Boye Rasmussen, Philip Loldrup Fosbøl

*Corresponding author for this work

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A new power-to-X desulfurization technology has been examined. The technology uses only electricity to oxidize the hydrogen sulfide (H2S) found in biogas to elemental sulfur. The process works by using a scrubber where the biogas comes into contact with a chlorine containing liquid. This process is capable of removing close to 100% of H2S in biogas. In this paper a parameter analysis of process parameters has been carried out. In addition a long term test of the process has been performed. It has been found that the liquid flow rate has a small but notable influence on the process’ performance on removing H2S. The efficiency of the process largely depends on total amount of H2S flowing through the scrubber. As the H2S concentration increases, the amount of chlorine required for the removal process is also increased. A high amount of chlorine in the solvent may lead to unwanted side reactions.
Original languageEnglish
Article number131334
JournalJournal of Hazardous Materials
Number of pages9
Publication statusPublished - 2023


  • Electrochemistry
  • Gas scrubbing
  • H2S removal
  • Oxidation
  • P2X


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