Photochemical valorization of hydrogen sulfide: a study of UV-induced decomposition pathways.

ABSTRACT: Hydrogen sulfide (H₂S) is a toxic and environmentally hazardous gas, yet it also represents a potential source of valuable hydrogen. This study investigates the direct gas-phase decomposition of H₂S into hydrogen (H₂) and elemental sulfur (S _x ) using UV-C light sources through both photolytic and photocatalytic pathways. Experiments were conducted using a 220 nm UV laser and a 254 nm mercury (Hg) lamp in distinct reactor configurations. Photolysis of 5% H₂S/N₂ achieved conversion efficiencies of up to 44% and 52% within 60 minutes using the laser and Hg lamp, respectively. In flow experiments (space velocity ∼15 h^-1), conversion decreased to 13-16%. In both static and flow modes, sulfur deposition on optic

SUBMITTER: Khan HA 

PROVIDER: S-EPMC12501960 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature