Ferrous ion scrubbing of flue gas

Details Ferrous ion scrubbing of flue gas Ferrous ion scrubbing of flue gas

1977-08-05

1978-11-21

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204151, 423242, 423574L, B01D 1302, C01B 1700

Patent

active

041265297

ABSTRACT:
An apparatus and method for removing oxides of nitrogen and sulfur from flue gases. The apparatus comprises an enclosure wherein the flue gases are washed with a scrubbing solution, preferably containing ferrous chelates and sulfite ions, and an electrochemical cell for regenerating the spent scrubbing solution. The electrochemical cell preferably comprises a plurality of cathode and anode compartments separated by ion transfer membranes. The spent scrubbing solution is regenerated by passing the solution through the cathode compartments of the electrochemical cell. The regeneration process involves the removal of the sulfate ions from the scrubbing solutions through the ion transfer membranes and the reduction of the nonreactive ferric chelate to the reactive ferrous chelate.

REFERENCES:
patent: 3523880 (1970-08-01), Parsi
patent: 3554895 (1971-01-01), McRae et al.
patent: 3761369 (1973-09-01), Tirrell
patent: 3788959 (1974-01-01), Smith
patent: 3969207 (1976-07-01), Kerti et al.
patent: 3974258 (1976-08-01), Poitevin et al.
patent: 4076793 (1978-02-01), Nikolai

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