Methods and configurations for H2S concentration in acid gas removal
US8845788B2 · kind B2 · utility
19Cited by
6References
14Claims
0Family size
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Inventor
Key dates
| Filing date | Aug 7, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Aug 7, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/151
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A syngas treatment plant is configured to remove sulfurous compounds from syngas in a configuration having two flash stages for a physical solvent to so enrich the acid gas to at least 40 mol % H2S or higher as required by the Claus unit and to flash and recycle CO2 back to the syngas feed. Contemplated methods and configurations advantageously remove sulfur to less than 10 ppmv while increasing H2S selectivity at high pressure operation to thereby allow production of an H2S stream that is suitable as feed gas to a Claus plant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.