skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases

Abstract

A process for the simultaneous removal of sulfur oxides and nitrogen oxides from power plant stack gases comprising contacting the stack gases with a supported iron oxide catalyst/absorbent in the presence of sufficient reducing agent selected from the group consisting of carbon monoxide, hydrogen, and mixtures thereof, to provide a net reducing atmosphere in the SO.sub.x /NO.sub.x removal zone. The sulfur oxides are removed by absorption substantially as iron sulfide, and nitrogen oxides are removed by catalytic reduction to nitrogen and ammonia. The spent iron oxide catalyst/absorbent is regenerated by oxidation and is recycled to the contacting zone. Sulfur dioxide is also produced during regeneration and can be utilized in the production of sulfuric acid and/or sulfur.

Inventors:
 [1];  [2]
  1. (Longview, WA)
  2. (Walnut Creek, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
862673
Patent Number(s):
US 3987146
Assignee:
United States of America as represented by United States Energy (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
simultaneous; removal; nitrogen; oxides; sulfur; combustion; gases; process; power; plant; stack; comprising; contacting; supported; iron; oxide; catalyst; absorbent; presence; sufficient; reducing; agent; selected; consisting; carbon; monoxide; hydrogen; mixtures; provide; net; atmosphere; zone; removed; absorption; substantially; sulfide; catalytic; reduction; ammonia; spent; regenerated; oxidation; recycled; dioxide; produced; regeneration; utilized; production; sulfuric; acid; gases comprising; oxide catalyst; nitrogen oxide; simultaneous removal; iron sulfide; sulfur oxide; sulfur oxides; reducing atmosphere; nitrogen oxides; carbon monoxide; sulfuric acid; sulfur dioxide; combustion gases; iron oxide; power plant; reducing agent; combustion gas; stack gases; catalytic reduction; agent selected; comprising contacting; stack gas; plant stack; contacting zone; supported iron; /423/

Citation Formats

Clay, David T., and Lynn, Scott. Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases. United States: N. p., 1976. Web.
Clay, David T., & Lynn, Scott. Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases. United States.
Clay, David T., and Lynn, Scott. Tue . "Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases". United States. https://www.osti.gov/servlets/purl/862673.
@article{osti_862673,
title = {Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases},
author = {Clay, David T. and Lynn, Scott},
abstractNote = {A process for the simultaneous removal of sulfur oxides and nitrogen oxides from power plant stack gases comprising contacting the stack gases with a supported iron oxide catalyst/absorbent in the presence of sufficient reducing agent selected from the group consisting of carbon monoxide, hydrogen, and mixtures thereof, to provide a net reducing atmosphere in the SO.sub.x /NO.sub.x removal zone. The sulfur oxides are removed by absorption substantially as iron sulfide, and nitrogen oxides are removed by catalytic reduction to nitrogen and ammonia. The spent iron oxide catalyst/absorbent is regenerated by oxidation and is recycled to the contacting zone. Sulfur dioxide is also produced during regeneration and can be utilized in the production of sulfuric acid and/or sulfur.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 19 00:00:00 EDT 1976},
month = {Tue Oct 19 00:00:00 EDT 1976}
}

Patent:

Save / Share: