Process for removing nitrogen oxides from gas
AssigneesFuji Kasui Engineering Co., Ltd., Sumitomo Metal Industries, Ltd.
InventorsTeizo Senjo, Makio Kobayashi
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Abstract
A process for efficiently removing nitrogen oxides with a very high rate from waste gas is provided wherein nitrogen monoxide contained in the gas is oxidized by chlorine dioxide or ozone, and then the oxidized gas is brought into contact with sodium chlorite in water solution in an absorption column.
Claims9
A process for removing nitrogen oxides from waste gas containing nitrogen oxides comprising the steps of adding chlorine dioxide to the waste gas whereby nitrogen monoxide contained in the waste gas is converted to NO.sub.2 and then removing the resultant NO.sub.2 by contacting the waste gas with an aqueous sodium chlorite solution in an absorption column.
A process for removing nitrogen oxides from waste gas containing nitrogen oxides comprising the steps of adding ozone in an amount of a mol ratio of ozone to nitrogen monoxide in the range from about 0.5 to about 1.0 to the waste gas whereby nitrogen monoxide contained in the waste gas is converted to NO.sub.2 and then removing the resultant NO.sub.2 by contacting the waste gas with an aqueous sodium chlorite solution in an absorption column.
Dependencies are inferred from the claim text.