Process for the removal of acid forming gases from exhaust gases
Abstract
Exhaust gases are treated to remove NO or NO[sub x] and SO[sub 2] by contacting the gases with an aqueous emulsion or suspension of yellow phosphorus preferably in a wet scrubber. The pressure is not critical, and ambient pressures are used. Hot water temperatures are best, but economics suggest about 50 C is attractive. The amount of yellow phosphorus used will vary with the composition of the exhaust gas, less than 3% for small concentrations of NO, and 10% or higher for concentrations above say 1000 ppm. Similarly, the pH will vary with the composition being treated, and it is adjusted with a suitable alkali. For mixtures of NO[sub x] and SO[sub 2], alkalis that are used for flue gas desulfurization are preferred. With this process, 100% of the by-products created are usable, and close to 100% of the NO or NO[sub x] and SO[sub 2] can be removed in an economic fashion. 9 figs.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7309911
- Patent Number(s):
- 5164167 A
- Application Number:
- PPN: US 7-261229
- Assignee:
- Univ. of California, Berkeley, CA (United States) PTO; EDB-94-090713
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 24 Oct 1988
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; EXHAUST GASES; DENITRIFICATION; DESULFURIZATION; AIR POLLUTION CONTROL; NITRIC OXIDE; NITROGEN OXIDES; SULFUR DIOXIDE; CHALCOGENIDES; CHEMICAL REACTIONS; CONTROL; FLUIDS; GASEOUS WASTES; GASES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; POLLUTION CONTROL; SULFUR COMPOUNDS; SULFUR OXIDES; WASTES; 540120* - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-); 010800 - Coal, Lignite, & Peat- Waste Management
Citation Formats
Chang, S.G., and Liu, D.K. Process for the removal of acid forming gases from exhaust gases. United States: N. p., 1992.
Web.
Chang, S.G., & Liu, D.K. Process for the removal of acid forming gases from exhaust gases. United States.
Chang, S.G., and Liu, D.K. Tue .
"Process for the removal of acid forming gases from exhaust gases". United States.
@article{osti_7309911,
title = {Process for the removal of acid forming gases from exhaust gases},
author = {Chang, S.G. and Liu, D.K.},
abstractNote = {Exhaust gases are treated to remove NO or NO[sub x] and SO[sub 2] by contacting the gases with an aqueous emulsion or suspension of yellow phosphorus preferably in a wet scrubber. The pressure is not critical, and ambient pressures are used. Hot water temperatures are best, but economics suggest about 50 C is attractive. The amount of yellow phosphorus used will vary with the composition of the exhaust gas, less than 3% for small concentrations of NO, and 10% or higher for concentrations above say 1000 ppm. Similarly, the pH will vary with the composition being treated, and it is adjusted with a suitable alkali. For mixtures of NO[sub x] and SO[sub 2], alkalis that are used for flue gas desulfurization are preferred. With this process, 100% of the by-products created are usable, and close to 100% of the NO or NO[sub x] and SO[sub 2] can be removed in an economic fashion. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {11}
}