| abstract |
In the process for reducing the total sulfur content of a high CO2-content feed gas stream, the feed gas is first passed to an absorption column. The unabsorbed, high CO2-content gas is then routed to a reduction step where it is combined with Claus off-gases and the sulfur compounds are reduced to H2S. The treated gas is then passed to a second absorption column and the unabsorbed gas is vented to the atmosphere. The fat solvent from both absorption columns is stripped in a common stripper and the stripped gas is passed to a Claus unit for conversion to elemental sulfur. |