Process for removal and recovery of sulfide from coal gas
US4155990A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1978 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Jan 4, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Hydrogen sulfide is removed from coal gas for gas turbine power generation and recovered as elemental sulfur by contacting a coal gas formed by gasification of coal with an iron oxide catalyst, thereby removing hydrogen sulfide from the coal gas and obtaining a desulfurized coal gas; regenerating the iron oxide catalyst of lowered desulfurization activity, thereby obtaining a regeneration off-gas containing sulfur dioxide; converting a portion of said desulfurized coal gas to reducing gas containing hydrogen; reacting the hydrogen of the resulting reducing gas with the sulfur dioxide in a portion of said regeneration off-gas, thereby producing hydrogen sulfide; reacting the resulting hydrogen sulfide with the sulfur dioxide in the remaining portion of the regeneration off-gas in the presence of a catalyst, thereby producing a gas containing elemental sulfur, and recovering the elemental sulfur from the gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.