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Title: Regeneration of sulfated metal oxides and carbonates

Abstract

Alkali metal or alkaline earth metal carbonates such as calcium carbonate and magnesium carbonate found in dolomite or limestone are employed for removal of sulfur dioxide from combustion exhaust gases. The sulfated carbonates are regenerated to oxides through use of a solid-solid reaction, particularly calcium sulfide with calcium sulfate to form calcium oxide and sulfur dioxide gas. The regeneration is performed by contacting the sulfated material with a reductant gas such as hydrogen within an inert diluent to produce calcium sulfide in mixture with the sulfate under process conditions selected to permit the sulfide-sulfate, solid-state reaction to occur.

Inventors:
 [1];  [2];  [3]
  1. (Plainfield, IL)
  2. (Downers Grove, IL)
  3. (Naperville, IL)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
863043
Patent Number(s):
US 4081522
Assignee:
United States of America as represented by United States (Washington, DC) ANL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
regeneration; sulfated; metal; oxides; carbonates; alkali; alkaline; earth; calcium; carbonate; magnesium; found; dolomite; limestone; employed; removal; sulfur; dioxide; combustion; exhaust; gases; regenerated; solid-solid; reaction; particularly; sulfide; sulfate; form; oxide; gas; performed; contacting; material; reductant; hydrogen; inert; diluent; produce; mixture; process; conditions; selected; permit; sulfide-sulfate; solid-state; occur; process conditions; combustion exhaust; metal carbonates; dioxide gas; calcium oxide; exhaust gases; alkali metal; metal oxide; alkaline earth; sulfur dioxide; earth metal; metal oxides; calcium carbonate; exhaust gas; calcium sulfate; calcium sulfide; metal carbonate; solid reaction; particularly calcium; metal carbon; form calcium; produce calcium; oxide gas; magnesium carbonate; /423/

Citation Formats

Hubble, Bill R., Siegel, Stanley, and Cunningham, Paul T. Regeneration of sulfated metal oxides and carbonates. United States: N. p., 1978. Web.
Hubble, Bill R., Siegel, Stanley, & Cunningham, Paul T. Regeneration of sulfated metal oxides and carbonates. United States.
Hubble, Bill R., Siegel, Stanley, and Cunningham, Paul T. Tue . "Regeneration of sulfated metal oxides and carbonates". United States. https://www.osti.gov/servlets/purl/863043.
@article{osti_863043,
title = {Regeneration of sulfated metal oxides and carbonates},
author = {Hubble, Bill R. and Siegel, Stanley and Cunningham, Paul T.},
abstractNote = {Alkali metal or alkaline earth metal carbonates such as calcium carbonate and magnesium carbonate found in dolomite or limestone are employed for removal of sulfur dioxide from combustion exhaust gases. The sulfated carbonates are regenerated to oxides through use of a solid-solid reaction, particularly calcium sulfide with calcium sulfate to form calcium oxide and sulfur dioxide gas. The regeneration is performed by contacting the sulfated material with a reductant gas such as hydrogen within an inert diluent to produce calcium sulfide in mixture with the sulfate under process conditions selected to permit the sulfide-sulfate, solid-state reaction to occur.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {3}
}

Patent:

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