Method for the desulfurization of hot product gases from coal gasifier
Abstract
The gasification of sulfur-bearing coal produces a synthesis gas which contains a considerable concentration of sulfur compounds especially hydrogen sulfide that renders the synthesis gas environmentally unacceptable unless the concentration of the sulfur compounds is significantly reduced. To provide for such a reduction in the sulfur compounds a calcium compound is added to the gasifier with the coal to provide some sulfur absorption. The synthesis gas from the gasifier contains sulfur compounds and is passed through an external bed of a regenerable solid absorbent, preferably zinc ferrite, for essentially completed desulfurizing the hot synthesis gas. This absorbent is, in turn, periodically or continuously regenerated by passing a mixture of steam and air or oxygen through the bed for converting absorbed hydrogen sulfide to sulfur dioxide. The resulting tail gas containing sulfur dioxide and steam is injected into the gasifier where the sulfur dioxide is converted by the calcium compound into a stable form of sulfur such as calcium sulfate.
- Inventors:
-
- Morgantown, WV
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- OSTI Identifier:
- 866709
- Patent Number(s):
- 4769045
- Assignee:
- United States Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10J - PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; desulfurization; hot; product; gases; coal; gasifier; gasification; sulfur-bearing; produces; synthesis; gas; contains; considerable; concentration; sulfur; compounds; especially; hydrogen; sulfide; renders; environmentally; unacceptable; unless; significantly; reduced; provide; reduction; calcium; compound; added; absorption; passed; external; bed; regenerable; solid; absorbent; preferably; zinc; ferrite; essentially; completed; desulfurizing; periodically; continuously; regenerated; passing; mixture; steam; air; oxygen; converting; absorbed; dioxide; resulting; tail; containing; injected; converted; stable; form; sulfate; stable form; significantly reduce; gas environment; hot product; solid absorbent; product gases; coal gasifier; product gas; gas containing; synthesis gas; sulfur dioxide; hydrogen sulfide; coal gas; sulfur compounds; significantly reduced; calcium sulfate; calcium compound; zinc ferrite; containing sulfur; coal produces; essentially complete; sulfur compound; /48/252/423/
Citation Formats
Grindley, Thomas. Method for the desulfurization of hot product gases from coal gasifier. United States: N. p., 1988.
Web.
Grindley, Thomas. Method for the desulfurization of hot product gases from coal gasifier. United States.
Grindley, Thomas. Fri .
"Method for the desulfurization of hot product gases from coal gasifier". United States. https://www.osti.gov/servlets/purl/866709.
@article{osti_866709,
title = {Method for the desulfurization of hot product gases from coal gasifier},
author = {Grindley, Thomas},
abstractNote = {The gasification of sulfur-bearing coal produces a synthesis gas which contains a considerable concentration of sulfur compounds especially hydrogen sulfide that renders the synthesis gas environmentally unacceptable unless the concentration of the sulfur compounds is significantly reduced. To provide for such a reduction in the sulfur compounds a calcium compound is added to the gasifier with the coal to provide some sulfur absorption. The synthesis gas from the gasifier contains sulfur compounds and is passed through an external bed of a regenerable solid absorbent, preferably zinc ferrite, for essentially completed desulfurizing the hot synthesis gas. This absorbent is, in turn, periodically or continuously regenerated by passing a mixture of steam and air or oxygen through the bed for converting absorbed hydrogen sulfide to sulfur dioxide. The resulting tail gas containing sulfur dioxide and steam is injected into the gasifier where the sulfur dioxide is converted by the calcium compound into a stable form of sulfur such as calcium sulfate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}