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Title: Method of removing sulfur emissions from a fluidized-bed combustion process

Abstract

Alkali metal or alkaline earth metal oxides are impregnated within refractory support material such as alumina and introduced into a fluidized-bed process for the combustion of coal. Sulfur dioxide produced during combustion reacts with the metal oxide to form metal sulfates within the porous support material. The support material is removed from the process and the metal sulfate regenerated to metal oxide by chemical reduction. Suitable pore sizes are originally developed within the support material by heat-treating to accommodate both the sulfation and regeneration while still maintaining good particle strength.

Inventors:
 [1];  [1];  [2]
  1. (Elmhurst, IL)
  2. (Naperville, IL)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
863090
Patent Number(s):
US 4091076
Assignee:
United States of America as represented by United States (Washington, DC) ANL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; removing; sulfur; emissions; fluidized-bed; combustion; process; alkali; metal; alkaline; earth; oxides; impregnated; refractory; support; material; alumina; introduced; coal; dioxide; produced; reacts; oxide; form; sulfates; porous; removed; sulfate; regenerated; chemical; reduction; suitable; pore; sizes; originally; developed; heat-treating; accommodate; sulfation; regeneration; maintaining; particle; strength; fluidized-bed combustion; metal sulfate; removing sulfur; combustion process; bed combustion; alkali metal; metal oxide; alkaline earth; pore size; sulfur dioxide; earth metal; metal oxides; porous support; pore sizes; support material; form metal; metal sulfates; chemical reduction; dioxide produced; oxide produced; /423/252/502/

Citation Formats

Vogel, Gerhard John, Jonke, Albert A., and Snyder, Robert B. Method of removing sulfur emissions from a fluidized-bed combustion process. United States: N. p., 1978. Web.
Vogel, Gerhard John, Jonke, Albert A., & Snyder, Robert B. Method of removing sulfur emissions from a fluidized-bed combustion process. United States.
Vogel, Gerhard John, Jonke, Albert A., and Snyder, Robert B. Sun . "Method of removing sulfur emissions from a fluidized-bed combustion process". United States. doi:. https://www.osti.gov/servlets/purl/863090.
@article{osti_863090,
title = {Method of removing sulfur emissions from a fluidized-bed combustion process},
author = {Vogel, Gerhard John and Jonke, Albert A. and Snyder, Robert B.},
abstractNote = {Alkali metal or alkaline earth metal oxides are impregnated within refractory support material such as alumina and introduced into a fluidized-bed process for the combustion of coal. Sulfur dioxide produced during combustion reacts with the metal oxide to form metal sulfates within the porous support material. The support material is removed from the process and the metal sulfate regenerated to metal oxide by chemical reduction. Suitable pore sizes are originally developed within the support material by heat-treating to accommodate both the sulfation and regeneration while still maintaining good particle strength.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1978},
month = {Sun Jan 01 00:00:00 EST 1978}
}

Patent:

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  • Alkali metal or alkaline earth metal oxides are impregnated within refractory support material such as alumina and introduced into a fluidized-bed process for the combustion of coal. Sulfur dioxide produced during combustion reacts with the metal oxide to form metal sulfates within the porous support material. The support material is removed from the process and the metal sulfate regenerated to metal oxide by chemical reduction. Suitable pore sizes are originally developed within the support material by heat-treating to accommodate both the sulfation and regeneration while still maintaining good particle strength.
  • Alkali metal or alkaline earth metal oxides are impregnated within refractory support material such as alumina and introduced into a fluidized-bed process for the combustion of coal. Sulfur dioxide produced during combustion reacts with the metal oxide to form metal sulfates within the porous support material. The support material is removed from the process and the metal sulfate regenerated to metal oxide by chemical reduction. Suitable pore sizes are originally developed within the support material by heat-treating to accommodate both the sulfation and regeneration while still maintaining good particle strength.
  • This patent describes a method of removing NO from a stream of combustion products injecting an alkyl amine into the stream to effect reduction of NO to N{sub 2}, wherein the alkyl amine comprises methyl amine, and the process is conducted at a temperature within the range of 350{degrees} C at a molar ratio to amine within the range of about 0.2 to 2.0 without a NO reduction catalyst, the method being capable of at least about a 50% conversion of NO in the combustion products to N{sub 2}.
  • This patent describes an improved process which includes treating combustion gas for removal of sulfur gases by providing in association with a finely divided carbonaceous fuel productive of the combustion gas a finely divided basic metal oxide reactant prior to combustion of the fuel. The process consists of: introducing an admixture of the fuel and the reactant to a pulverizer in respective amounts which effect a Ca:S ratio effective to meet a desired sulfur emissions standard; copulverizing the admixture in the pulverizer which reduces the admixture to a prepared fuel composition of approximately the Ca:S ratio predominating by weight inmore » individual particles sized below about 325 mesh with a surface area greater than 1/4 square meters per gram; and introducing the prepared fuel composition to a burner within a combustion chamber.« less