Method of removing sulfur dioxide and nitrogen oxides from a gas

Details Method of removing sulfur dioxide and nitrogen oxides from a gas Method of removing sulfur dioxide and nitrogen oxides from a gas

1996-04-19

1998-07-28

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electrolytic material treatment

Gas, vapor, or critical fluid

205770, 423235, 4232423, 42324307, 42324407, B01D 1706, B01D 5940, C01B 2100, C01B 1720

Patent

active

057858411

ABSTRACT:
A method for removing sulfur dioxide and nitrogen oxides from a gaseous stream using a magnesium-enhanced lime scrubbing slurry containing a ferrous chelate where oxidized ferrous chelate is regenerated by electrochemical treatment. The spent scrubbing solution containing ferric chelates is passed as a catholyte, at an acidic pH of 4.0-6.5 through a cathode compartment while an anolyte solution containing magnesium sulfate, at a pH of 1.5 to 6.5 is passed through an anode compartment, the compartments separated by a microporous separator. An electrical current is passed from the cathode compartment to the anode compartment and ferric chelates are regenerated to ferrous chelates.

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