Selective oxidation of hydrogen sulfide to sulfur over activated carbon-supported metal oxides

Research on adsorptive desulfurization of H2S from natural gas over MnxOy-CoxOy supported on activated carbon

“…Recently, the modification of activated carbon has become a hot topic. As reported by Hui-bin Fang (Fang et al., 2013), metal oxides supported on activated carbon adsorbents showed much higher desulfurization performances for H 2 S. The desulfurization performances of various adsorbents decreased in the order: Mn/AC > Cu/AC > Fe/AC > Ce/AC > Co/AC > V/AC. It has been shown (Li et al., 2011) that Co x O y /AC has electrocatalytic activity for oxygen reduction reaction under acidic conditions.…”

Effect of Surface Properties of Iron Oxide Sorbents on Hydrogen Sulfide Removal from Odor

“…Hence, the activity loss is mainly due to the gradual oxidation of H 2 S into elemental sulfur and further into the sulfuric acid and sulfurous acid with time on stream on the surface of the sorbent. As a low cost and widely used sorbent, the sulfur capacity of the iron oxide sorbent is relatively lower than that of activated carbon, zeolites, and other metal based sorbents . Thus, the improvement of sulfur capacity will greatly stimulate its application.…”

“…In addition, high H 2 S concentrations seriously affect the nervous and respiratory system of human. Many attentions have been focused on H 2 S removal from odor gas arising from sewage treatment facilities as the restrictive emission standards are enacted world widely . The removal of H 2 S with iron oxide sorbents is a classic and effective desulfurization method due to its advantages of high sulfur removal efficiency, low cost, simple operation, and no secondary waste for additional treatment .…”

Synthesis and characterization of MnxOy–ZnxOy/AC adsorbents for adsorptive removal of H2S from natural gas

“…However, adsorption on unmodified activated carbon is mainly physisorption, and hence the adsorption performance is poor. As reported by Fang, an adsorbent made of activated carbon loaded with metal oxide shows superior performance in H 2 S removal (Fang et al, 2013). Indeed, more and more researchers are focusing on activated carbon loaded with metal oxides for desulfurization.…”