Desulfurization sorbent regeneration
Abstract
A spent solid sorbent resulting from the removal of hydrogen sulfide from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing metal sulfide at a temperature above 500/sup 0/C to regenerate the sulfide to metal oxide or carbonate. Various metal species including the period four transition metals and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of metal sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent. This method may be used for high-temperature fuel cells.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6213172
- Application Number:
- ON: DE83013200
- Assignee:
- EDB-83-111304
- DOE Contract Number:
- W-31-109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; 01 COAL, LIGNITE, AND PEAT; ADSORBENTS; REGENERATION; FUEL GAS; DESULFURIZATION; HIGH-TEMPERATURE FUEL CELLS; FUEL SYSTEMS; NATURAL GAS; PRODUCER GAS; CARBON DIOXIDE; HYDROGEN SULFIDES; RARE EARTHS; STEAM; TRANSITION ELEMENTS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; DIRECT ENERGY CONVERTERS; ELECTROCHEMICAL CELLS; ELEMENTS; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUEL CELLS; FUELS; GAS FUELS; GASES; HYDROGEN COMPOUNDS; LOW BTU GAS; METALS; OXIDES; OXYGEN COMPOUNDS; SULFIDES; SULFUR COMPOUNDS; 300503* - Fuel Cells- Materials, Components, & Auxiliaries; 010402 - Coal, Lignite, & Peat- Purification & Upgrading
Citation Formats
Jalan, V M, and Frost, D G. Desulfurization sorbent regeneration. United States: N. p., 1982.
Web.
Jalan, V M, & Frost, D G. Desulfurization sorbent regeneration. United States.
Jalan, V M, and Frost, D G. Wed .
"Desulfurization sorbent regeneration". United States.
@article{osti_6213172,
title = {Desulfurization sorbent regeneration},
author = {Jalan, V M and Frost, D G},
abstractNote = {A spent solid sorbent resulting from the removal of hydrogen sulfide from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing metal sulfide at a temperature above 500/sup 0/C to regenerate the sulfide to metal oxide or carbonate. Various metal species including the period four transition metals and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of metal sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent. This method may be used for high-temperature fuel cells.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {7}
}