Removal of atmospheric pollutants from gas, related apparatus, processes and uses thereof
Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO 2 with a second stream comprising (ClO 2 ) 0 to provide a third stream comprising NO and NO 2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO 2 to MNO 2 .
1. A method comprising:
contacting a first stream comprising NO and/or NO 2 with a second stream comprising (ClO 2 ) 0 to provide a third stream comprising NO and NO 2 at a molar ratio of about 1:1; and
contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO 2 to MNO 2 .
2. The method of claim 1 , wherein the fourth stream further comprises an oxidant at a concentration by weight of about 2% to about 6%.
3. The method of claim 1 , wherein:
the second stream comprises (ClO 2 ) 0 adsorbed, suspended and/or dissolved in a liquid composition; and/or
the second stream comprises (ClO 2 ) 0 gas and the first stream contacts the second stream.