| 摘要 |
A treatment method for removing acid gases by contacting a sour gas stream with a solvent (e.g., an organic amine) which absorbs H2S in preference to CO2 and hydrocarbons. The rich solvent is then regenerated by selectively separating the absorbed hydrocarbons in a first flash, a large portion of the CO2 in a high-temperature, low-pressure second flash tank, and the substantially all of the remaining acid gases in a high-temperature, low-pressure stripper. The regenerated solvent is recycled and the recovered acid gases are processed to recover sulphur from the H2S. The CO2 recovered from the second tank is contacted with a second solvent to provide high-quality CO2.
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