Adsorption-Catalytic Purification by Carbon Fibers

The possibility of carbon fibers use for the removal of H₂S from H₂S/H₂/Ar and H₂S/Ar gas mixtures has been studied. Cu-containing carbon fibers and Cu-containing activated carbon fibers proved to be most efficient materials for removing of H₂S small amounts in 298-1173 K temperature range at the atmospheric pressure. Depending on the treatment method and the specific surface area and porosity values carbon fibers have different sorption and catalytic properties at different temperatures. H₂S sorption from gas mixtures was observed at room temperature while H₂S decomposition to H₂ and S occurred at elevated temperatures. Cu-containing activated carbon fibers modified by chemical treatment should be used at room temperature. Less expensive Cu-containing carbon fibers can be used at elevated temperatures.