Green H2S Mitigation: Exploring the Eco-Friendly Chelant-Metal Ion Adsorbents

Abstract Hydrogen sulfide (H2S) is a highly toxic and corrosive gas commonly found in industrial processes such as natural gas production, geothermal power generation, and oil refining. This work presents the development of a novel non-toxic H2S scavenger, FeQ(Chel(A)), which consists of a metal iron complex with an eco-friendly chelating agent. The PLONOR (Posing Little or No Risk) listed chelant effectively binds the metal complex, which enables rapid reaction with dissolved H2S to form inert sulfur species. FeQ(Chel(A)) demonstrates superior H2S removal capacity compared to existing scavengers like MEAtriazine at similar activity levels while maintaining excellent stability in acidic conditions. Its non-toxic synthesis and application make it an environmentally friendly solution for H₂S mitigation in energy and industrial sectors. Ongoing research focuses on scaling production and optimizing performance for high H2S concentrations in processes like biogas production. This innovative technology contributes to a cleaner, safer industrial environment while promoting sustainability.