Process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal sulfide sorbents
Abstract
A process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal-sulfur compound. Spent metal-sulfur compound is regenerated to re-usable metal oxide by moving a bed of spent metal-sulfur compound progressively through a single regeneration vessel having a first and second regeneration stage and a third cooling and purging stage. The regeneration is carried out and elemental sulfur is generated in the first stage by introducing a first gas of sulfur dioxide which contains oxygen at a concentration less than the stoichiometric amount required for complete oxidation of the spent metal-sulfur compound. A second gas containing sulfur dioxide and excess oxygen at a concentration sufficient for complete oxidation of the partially spent metal-sulfur compound, is introduced into the second regeneration stage. Gaseous sulfur formed in the first regeneration stage is removed prior to introducing the second gas into the second regeneration stage. An oxygen-containing gas is introduced into the third cooling and purging stage. Except for the gaseous sulfur removed from the first stage, the combined gases derived from the regeneration stages which are generally rich in sulfur dioxide and lean in oxygen, are removed from the regenerator as an off-gas and recycled as the first andmore »
- Inventors:
-
- Clifton Park, NY
- Lititz, PA
- Issue Date:
- Research Org.:
- General Electric Co., Boston, MA (United States)
- OSTI Identifier:
- 869802
- Patent Number(s):
- 5401475
- Assignee:
- G.E. Environmental Services, Inc. (Lebanon, PA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
- DOE Contract Number:
- AC21-88MC25003
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- process; apparatus; generating; elemental; sulfur; re-usable; metal; oxide; spent; sulfide; sorbents; metal-sulfur; compound; regenerated; moving; bed; progressively; single; regeneration; vessel; stage; third; cooling; purging; carried; generated; introducing; gas; dioxide; contains; oxygen; concentration; stoichiometric; amount; required; complete; oxidation; containing; excess; sufficient; partially; introduced; gaseous; formed; removed; prior; oxygen-containing; combined; gases; derived; stages; rich; lean; regenerator; off-gas; recycled; controlled; adding; air; oxygen-enriched; pure; complete oxidation; spent metal-sulfur; pure oxygen; oxygen concentration; partially spent; metal sulfide; gas containing; elemental sulfur; oxygen-containing gas; metal oxide; sulfur dioxide; enriched air; containing gas; stoichiometric amount; re-usable metal; spent metal; amount required; containing sulfur; excess oxygen; combined gas; oxygen-enriched air; contains oxygen; gases derived; generating elemental; sulfur compound; /422/423/502/
Citation Formats
Ayala, Raul E, and Gal, Eli. Process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal sulfide sorbents. United States: N. p., 1995.
Web.
Ayala, Raul E, & Gal, Eli. Process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal sulfide sorbents. United States.
Ayala, Raul E, and Gal, Eli. Sun .
"Process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal sulfide sorbents". United States. https://www.osti.gov/servlets/purl/869802.
@article{osti_869802,
title = {Process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal sulfide sorbents},
author = {Ayala, Raul E and Gal, Eli},
abstractNote = {A process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal-sulfur compound. Spent metal-sulfur compound is regenerated to re-usable metal oxide by moving a bed of spent metal-sulfur compound progressively through a single regeneration vessel having a first and second regeneration stage and a third cooling and purging stage. The regeneration is carried out and elemental sulfur is generated in the first stage by introducing a first gas of sulfur dioxide which contains oxygen at a concentration less than the stoichiometric amount required for complete oxidation of the spent metal-sulfur compound. A second gas containing sulfur dioxide and excess oxygen at a concentration sufficient for complete oxidation of the partially spent metal-sulfur compound, is introduced into the second regeneration stage. Gaseous sulfur formed in the first regeneration stage is removed prior to introducing the second gas into the second regeneration stage. An oxygen-containing gas is introduced into the third cooling and purging stage. Except for the gaseous sulfur removed from the first stage, the combined gases derived from the regeneration stages which are generally rich in sulfur dioxide and lean in oxygen, are removed from the regenerator as an off-gas and recycled as the first and second gas into the regenerator. Oxygen concentration is controlled by adding air, oxygen-enriched air or pure oxygen to the recycled off-gas.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}
Works referenced in this record:
Kinetic studies on the reactions involved in the hot gas desulfurization using a regenerable iron oxide sorbent—II
journal, January 1981
- Tseng, S. C.; Tamhankar, S. S.; Wen, C. Y.
- Chemical Engineering Science, Vol. 36, Issue 8