Air pollution reduction

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component

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423523, 55 73, C01B 1700, C01B 1782, B01D 1900

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active

045579121

ABSTRACT:
The method of reducing air pollution comprises treating air-polluting waste industrial flue gases containing sulfur dioxide in a manner effective to substantially reduce the content of sulfur dioxide therein and remove it in the form of a sulfuric acid by-product prior to discharge of the treated flue gases into the atmosphere. The treatment involves the use of towers and nitrogen oxides for effecting the oxidation of sulfur dioxide to the trioxide. Preferably, the waste industrial flue gas is separated into a low molecular weight fraction and a higher molecular weight portion, as by centrifugal action to concentrate the heavier sulfur dioxide molecules, before treating only the higher weight portion.

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J. E. Ferguson, "Inorganic Chemistry and the Earth", Pergamon Press, 1982, pp. 167-169.
Mellor's "Modern Inorganic Chemistry", 1967, pp. 496-503.

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