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Title: Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion

Abstract

Lime utilization for sulfurous oxides absorption in fluidized combustion of carbonaceous fuels is improved by impregnation of porous lime particulates with iron oxide. The impregnation is achieved by spraying an aqueous solution of mixed iron sulfate and sulfite on the limestone before transfer to the fluidized bed combustor, whereby the iron compounds react with the limestone substrate to form iron oxide at the limestone surface. It is found that iron oxide present in the spent limestone acts as a catalyst to regenerate the spent limestone in a reducing environment. With only small quantities of iron oxide the calcium can be recycled at a significantly increased rate.

Inventors:
 [1];  [2]
  1. (Rocky Point, NY)
  2. (Middle Island, NY)
Issue Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY
OSTI Identifier:
863671
Patent Number(s):
4225572
Assignee:
United States of America as represented by United States (Washington, DC) BNL
DOE Contract Number:  
EY-76-C-02-0016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
catalytic; iron; oxide; lime; regeneration; carbonaceous; fuel; combustion; utilization; sulfurous; oxides; absorption; fluidized; fuels; improved; impregnation; porous; particulates; achieved; spraying; aqueous; solution; mixed; sulfate; sulfite; limestone; transfer; bed; combustor; whereby; compounds; react; substrate; form; surface; found; spent; catalyst; regenerate; reducing; environment; quantities; calcium; recycled; significantly; increased; rate; carbonaceous fuels; iron sulfate; fluidized bed; aqueous solution; iron oxide; bed combustor; fuel combustion; carbonaceous fuel; reducing environment; significantly increased; fluidized combustion; form iron; sulfurous oxides; significantly increase; porous lime; lime particulates; lime utilization; /423/

Citation Formats

Shen, Ming-Shing, and Yang, Ralph T. Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion. United States: N. p., 1980. Web.
Shen, Ming-Shing, & Yang, Ralph T. Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion. United States.
Shen, Ming-Shing, and Yang, Ralph T. Tue . "Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion". United States. https://www.osti.gov/servlets/purl/863671.
@article{osti_863671,
title = {Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion},
author = {Shen, Ming-Shing and Yang, Ralph T.},
abstractNote = {Lime utilization for sulfurous oxides absorption in fluidized combustion of carbonaceous fuels is improved by impregnation of porous lime particulates with iron oxide. The impregnation is achieved by spraying an aqueous solution of mixed iron sulfate and sulfite on the limestone before transfer to the fluidized bed combustor, whereby the iron compounds react with the limestone substrate to form iron oxide at the limestone surface. It is found that iron oxide present in the spent limestone acts as a catalyst to regenerate the spent limestone in a reducing environment. With only small quantities of iron oxide the calcium can be recycled at a significantly increased rate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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