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Title: Carbonaceous fuel combustion with improved desulfurization

Abstract

Lime utilization for sulfurous oxides adsorption 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. The iron oxide present in the spent limestone is found to catalyze the regeneration rate of the spent limestone in a reducing environment. Thus both the calcium and iron components may be recycled.

Inventors:
 [1];  [2]
  1. Middle Island, NY
  2. Rocky Point, NY
Issue Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
OSTI Identifier:
863517
Patent Number(s):
4191115
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23J - REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
EY-76-C-02-0016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
carbonaceous; fuel; combustion; improved; desulfurization; lime; utilization; sulfurous; oxides; adsorption; fluidized; fuels; impregnation; porous; particulates; iron; oxide; achieved; spraying; aqueous; solution; mixed; sulfate; sulfite; limestone; transfer; bed; combustor; whereby; compounds; react; substrate; form; surface; spent; found; catalyze; regeneration; rate; reducing; environment; calcium; components; recycled; carbonaceous fuels; iron sulfate; fluidized bed; aqueous solution; iron oxide; bed combustor; fuel combustion; carbonaceous fuel; reducing environment; fluidized combustion; form iron; sulfurous oxides; porous lime; lime particulates; lime utilization; /110/122/252/423/

Citation Formats

Yang, Ralph T, and Shen, Ming-shing. Carbonaceous fuel combustion with improved desulfurization. United States: N. p., 1980. Web.
Yang, Ralph T, & Shen, Ming-shing. Carbonaceous fuel combustion with improved desulfurization. United States.
Yang, Ralph T, and Shen, Ming-shing. Tue . "Carbonaceous fuel combustion with improved desulfurization". United States. https://www.osti.gov/servlets/purl/863517.
@article{osti_863517,
title = {Carbonaceous fuel combustion with improved desulfurization},
author = {Yang, Ralph T and Shen, Ming-shing},
abstractNote = {Lime utilization for sulfurous oxides adsorption 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. The iron oxide present in the spent limestone is found to catalyze the regeneration rate of the spent limestone in a reducing environment. Thus both the calcium and iron components may be recycled.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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