The use of wet limestone systems for combined removal of SO sub 2 and NO sub x from flue gas

Conference · Thu Mar 01 00:00:00 EST 1990

OSTI ID:6549711

Lee, G C ^[1]; Shen, D X; Littlejohn, D; Chang, S G ^[2]

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1. Bechtel Corp., San Francisco, CA (USA)
2. Lawrence Berkeley Lab., CA (USA)

A new approach by utilizing yellow phosphorus in conventional wet limestone systems for high efficiency control of SO{sub 2} and NO{sub x} emissions from power plants has been developed. The addition of yellow phosphorus in the system induces the production of O{sub 3} which subsequently oxidizes NO to NO{sub 2}. The resulting NO{sub 2} dissolves readily and can be reduced to form ammonium ions by dissolved SO{sub 2} under appropriate conditions. Yellow phosphorus is oxidized to yield P{sub 2}O{sub 5} which picks up water to form H{sub 3}PO{sub 4} mists and can be collected as a valuable product. Proof of concept experiments have been performed using a 20 acfm bench-scale system. The results show that better than 90% of SO{sub 2} and NO in simulated flue gas can be removed. Stoichiometric ratios (P/NO) ranging between 0.6 and 1.5 were obtained. This ratio depends on operating conditions as well as the process configuration. A conceptual process flow diagram has been proposed. A preliminary cost evaluation of this approach appears to indicate great economic potential. 22 refs., 8 figs., 1 tab.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6549711
• Report Number(s): LBL-27595; CONF-900524-1; ON: DE91000224
• Resource Relation: Conference: 1990 SO/sub 2/ control symposium, New Orleans, LA (USA), 8-11 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
COMBINED SOXNOX PROCESSES
ADDITIVES
FLUE GAS
AIR POLLUTION CONTROL
NITRIC OXIDE
OXIDATION
NITROGEN OXIDES
SULFUR DIOXIDE
CHEMICAL REACTION KINETICS
ECONOMICS
FOSSIL-FUEL POWER PLANTS
LIMESTONE
NITROGEN DIOXIDE
OZONE
PHOSPHORUS
PHOSPHORUS OXIDES
STOICHIOMETRY
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ELEMENTS
GASEOUS WASTES
KINETICS
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
REACTION KINETICS
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)