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Title: 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:
;
Publication 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 = {Wed Jul 07 00:00:00 EDT 1982},
month = {Wed Jul 07 00:00:00 EDT 1982}
}