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Method of removing oxides of sulfur and oxides of nitrogen from exhaust gases

Patent ·
OSTI ID:5101057
A method is described of removing oxides of sulfur and oxides of nitrogen from an exhaust gas, the method comprising: contacting the exhaust gas with a liquid absorbent including a metal chelate for oxide of nitrogen absorption and a solution of sulfite and bisulfite ions for oxide of sulfur absorption; regenerating the liquid absorbent capacity for oxide of sulfur gases by electrodialysis in a cell containing at least two bipolar membranes, an anion selective membrane and compartments bounded by the membranes; stripping oxides of nitrogen from the liquid absorbent into a gas flow to regenerate the capacity of the liquid absorbent for oxide of nitrogen gases; and recycling the regenerated liquid absorbent into contact with the exhaust gas.
Assignee:
Dept. of Energy, Washington, DC
Patent Number(s):
US 4615780
OSTI ID:
5101057
Country of Publication:
United States
Language:
English

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Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ANIONS
CHALCOGENIDES
CHARGED PARTICLES
CHELATES
COMPLEXES
CONTROL
DIALYSIS
ELECTRIC POTENTIAL
ELECTRODIALYSIS
ELEMENTS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
IONS
MEMBRANES
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
RECYCLING
REGENERATION
REMOVAL
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
SURFACE PROPERTIES
WASTES