Power-to-X electroscrubbing parameter analysis for biogas desulfurization.

A new power-to-X desulfurization technology has been examined. The technology uses only electricity to oxidize the hydrogen sulfide (H 2 S) 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 H 2 S 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 H 2 S. The efficiency of the process largely depends on total amount of H 2 S flowing through the scrubber. As the H 2 S 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. [Display omitted] • A PtX technology capable of removing hydrogen sulfide from gas has been developed. • Electrochemically regenerated chlorine oxidizes hydrogen sulfide to solid sulfur. • The technology can purify gas to a high degree and is quickly adaptable. • The solvent flow has only a small effect on the efficiency of the process. • The process is stable over longer periods of operation. [ABSTRACT FROM AUTHOR]