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

doi:10.1016/j.jhazmat.2023.131334

Power-to-X electroscrubbing parameter analysis for biogas desulfurization

J Hazard Mater. 2023 Jun 15:452:131334. doi: 10.1016/j.jhazmat.2023.131334. Epub 2023 Mar 31.

Authors

Sebastian Borgquist¹, Sebastian Nis Bay Villadsen², Christina Skitsi², Katrine Boesgaard³, Jens Abildskov², Rodrigo Rivera-Tinoco⁴, Jan Boye Rasmussen³, Philip Loldrup Fosbøl²

Affiliations

¹ Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. Electronic address: seborg@kt.dtu.dk.
² Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
³ Elplatek, 3060 Espergærde, Denmark.
⁴ Pentair, 5928 PW Venlo, the Netherlands.

PMID: 37023573
DOI: 10.1016/j.jhazmat.2023.131334

Abstract

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.

Keywords: Electrochemistry; Gas scrubbing; H(2)S removal; Oxidation; P2X.