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Title: Exhaust gas clean up process

Abstract

A method of cleaning an exhaust gas containing particulates, SO/sub 2/ and NO/sub x/ is described. The method involves prescrubbing with water to remove HCl and most of the particulates, scrubbing with an aqueous absorbent containing a metal chelate and dissolved sulfite salt to remove NO/sub x/ and SO/sub 2/, and regenerating the absorbent solution by controlled heating, electrodialysis and carbonate salt addition. The NO/sub x/ is removed as N/sub 2/ gas or nitrogen sulfonate ions and the oxides of sulfur are removed as a valuable sulfate salt. 4 figs.

Inventors:
Publication Date:
Research Org.:
USDOE Pittsburgh Energy Technology Center, PA
OSTI Identifier:
6353053
Patent Number(s):
PATENTS-US-A7207562
Application Number:
ON: DE89010800
Assignee:
Dept. of Energy TIC; ERA-14-026230; EDB-89-068014
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; CHELATES; SORPTIVE PROPERTIES; HYDROCHLORIC ACID; REMOVAL; NITROGEN OXIDES; ABSORPTION; SULFITES; SULFUR DIOXIDE; AQUEOUS SOLUTIONS; CLEANING; ELECTRODIALYSIS; EXHAUST GASES; FLUE GAS; HEAT TREATMENTS; HOT GAS CLEANUP; INVENTIONS; PARTICULATES; REGENERATION; SALTS; SCRUBBING; CHALCOGENIDES; COMPLEXES; DIALYSIS; DISPERSIONS; FLUIDS; GASEOUS WASTES; GASES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; MIXTURES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PARTICLES; PURIFICATION; SEPARATION PROCESSES; SOLUTIONS; SULFUR COMPOUNDS; SULFUR OXIDES; SURFACE PROPERTIES; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management; 200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions

Citation Formats

Walker, R.J. Exhaust gas clean up process. United States: N. p., 1988. Web.
Walker, R.J. Exhaust gas clean up process. United States.
Walker, R.J. Thu . "Exhaust gas clean up process". United States.
@article{osti_6353053,
title = {Exhaust gas clean up process},
author = {Walker, R.J.},
abstractNote = {A method of cleaning an exhaust gas containing particulates, SO/sub 2/ and NO/sub x/ is described. The method involves prescrubbing with water to remove HCl and most of the particulates, scrubbing with an aqueous absorbent containing a metal chelate and dissolved sulfite salt to remove NO/sub x/ and SO/sub 2/, and regenerating the absorbent solution by controlled heating, electrodialysis and carbonate salt addition. The NO/sub x/ is removed as N/sub 2/ gas or nitrogen sulfonate ions and the oxides of sulfur are removed as a valuable sulfate salt. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {6}
}