Method for removing sulfur oxides from combusting gases in wet, calcium-based flue gas desulfurization processes

Patent · Mon Feb 18 23:00:00 EST 1991

OSTI ID:5637652

Moser, R E; Meserole, F

This patent describes a method for reducing accumulation of solid sulfate-containing deposits in apparatus for storing, transporting or utilizing wet lime or limestone for combustion gas desulfurization. It comprises: the step of contact the combustion gas in a reaction zone in the presence of the wet lime or limestone with thiosulfate and an organic polyacid chelating agent. The thiosulfate and chelating agent being present in sufficient concentrations to diminish the amount of sulfate formed as the result of oxidation of sulfite to sulfate.

• Assignee: Electric Power Research Institute, Inc., Palo Alto, CA (USA)
• Patent Number(s): US 4994246; A
• Application Number: PPN: US 7-280752
• OSTI ID: 5637652
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHELATING AGENTS
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
INHIBITION
LIME-LIMESTONE WET SCRUBBING PROCESSES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
SCRUBBING
SULFATES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THIOSULFATES
WASTES