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Title: Desulfurization of fuel gases in fluidized bed gasification and hot fuel gas cleanup systems

Abstract

A problem with the commercialization of fluidized bed gasification is that vast amounts of spent sorbent are generated if the sorbent is used on a once-through basis, especially if high sulfur coals are burned. The requirements of a sorbent for regenerative service in the FBG process are: (1) it must be capable of reducing the sulfur containing gas concentration of the FBG flue gas to within acceptable environmental standards; (2) it must not lose its reactivity on cyclic sulfidation and regeneration; (3) it must be capable of regeneration with elimination of substantially all of its sulfur content; (4) it must have good attrition resistance; and, (5) its cost must not be prohibitive. It has now been discovered that calcium silicate pellets, e.g., Portland cement type III pellets meet the criteria aforesaid. Calcium silicate removes COS and H/sub 2/S according to the reactions given to produce calcium sulfide silicate. The sulfur containing product can be regenerated using CO/sub 2/ as the regenerant. The sulfur dioxide can be conveniently reduced to sulfur with hydrogen or carbon for market or storage. The basic reactions in the process of this invention are the reactions with calcium silicate given in the patent. A convenient andmore » inexpensive source of calcium silicate is Portland cement. Portland cement is a readily available, widely used construction meterial.« less

Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
5001235
Application Number:
ON: DE84011309
Assignee:
Dept. of Energy ERA-09-025232; EDB-84-078827
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CALCIUM SILICATES; SORPTIVE PROPERTIES; FUEL GAS; DESULFURIZATION; HOT GAS CLEANUP; CEMENTS; CHEMICAL REACTIONS; COAL GASIFICATION; FLUIDIZED BED; PATENTS; REGENERATION; ALKALINE EARTH METAL COMPOUNDS; BUILDING MATERIALS; CALCIUM COMPOUNDS; DOCUMENT TYPES; FLUIDS; FUELS; GAS FUELS; GASES; GASIFICATION; MATERIALS; OXYGEN COMPOUNDS; PURIFICATION; SILICATES; SILICON COMPOUNDS; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; 010402* - Coal, Lignite, & Peat- Purification & Upgrading

Citation Formats

Steinberg, M., Farber, G., Pruzansky, J., Yoo, H.J., and McGauley, P. Desulfurization of fuel gases in fluidized bed gasification and hot fuel gas cleanup systems. United States: N. p., 1983. Web.
Steinberg, M., Farber, G., Pruzansky, J., Yoo, H.J., & McGauley, P. Desulfurization of fuel gases in fluidized bed gasification and hot fuel gas cleanup systems. United States.
Steinberg, M., Farber, G., Pruzansky, J., Yoo, H.J., and McGauley, P. Fri . "Desulfurization of fuel gases in fluidized bed gasification and hot fuel gas cleanup systems". United States.
@article{osti_5001235,
title = {Desulfurization of fuel gases in fluidized bed gasification and hot fuel gas cleanup systems},
author = {Steinberg, M. and Farber, G. and Pruzansky, J. and Yoo, H.J. and McGauley, P.},
abstractNote = {A problem with the commercialization of fluidized bed gasification is that vast amounts of spent sorbent are generated if the sorbent is used on a once-through basis, especially if high sulfur coals are burned. The requirements of a sorbent for regenerative service in the FBG process are: (1) it must be capable of reducing the sulfur containing gas concentration of the FBG flue gas to within acceptable environmental standards; (2) it must not lose its reactivity on cyclic sulfidation and regeneration; (3) it must be capable of regeneration with elimination of substantially all of its sulfur content; (4) it must have good attrition resistance; and, (5) its cost must not be prohibitive. It has now been discovered that calcium silicate pellets, e.g., Portland cement type III pellets meet the criteria aforesaid. Calcium silicate removes COS and H/sub 2/S according to the reactions given to produce calcium sulfide silicate. The sulfur containing product can be regenerated using CO/sub 2/ as the regenerant. The sulfur dioxide can be conveniently reduced to sulfur with hydrogen or carbon for market or storage. The basic reactions in the process of this invention are the reactions with calcium silicate given in the patent. A convenient and inexpensive source of calcium silicate is Portland cement. Portland cement is a readily available, widely used construction meterial.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {8}
}