Research progress of removal of H₂S from coal gas by dry method

This paper summarizes the research progress of the removal of hydrogen sulfide from coal gas by the dry method with activated-carbon, metal oxides, complex metal oxides and activated-carbon supported metal oxides. The characteristics of activated-carbon and metal oxides as sorbents are analyzed, including treatment temperature, desulfurization efficiency and regeneration, etc. The complex metal oxides and activated-carbon supported metal oxides are regarded as prospective sorbents for industrial applications and have better performance during desulfurization and regeneration. According to the mechanisms of desulfurization, it is feasible to prepare sorbents for desulfurization with semi-coke and metal oxides due to the similarity of semi-coke and activated carbon in their properties.