| 摘要 |
A method and apparatus for the removal of hydrogen sulfide (H2S) from gaseous streams, particularly concentrations of H2S lower than 100 ppm. The invention is particularly useful for removing H2S from natural gas. The invention involves contacting a gaseous stream containing hydrogen sulfide with a sorbent solution comprising a substantially non-aqueous solvent having a low vapor pressure and a high donor number, such as dimethyl sulfoxide, a concentration of a polyvalent reducible metal ion in an oxidative state sufficient to oxidize the hydrogen sulfide to form at least one soluble sulfur compound, such as Fe3+, and a counter-ion for the metal ion, such as Cl-; and regenerating the oxidative state of the metal ion reduced by the hydrogen sulfide.
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