Patent ID: 7488456

Claim:
An apparatus for treating atmospheric pollutants, which apparatus comprises a heat exchange device; a first composition including a precious metal-free trap material supported on an atmosphere contacting surface of the heat exchange device, the trap material being capable of trapping at least one atmospheric reducing pollutant; a second composition including at least one second reducing agent for reducing at least one atmospheric oxidizing pollutant, which at least one second reducing agent comprises a manganese-based reducing agent, one or more precious metals, copper, iron, zinc or a mixture of any two or more of copper, iron and zinc and is supported on: (i) the same atmosphere contacting surface as the first composition or (ii) a different atmosphere contacting surface of the heat exchange device from the trap material; and arranged such that the at least one second reducing agent is contacted by the atmospheric pollutants leaving the trap material; and means for causing movement of the heat exchange device relative to the atmosphere for contacting the supported trap material with at least one atmospheric oxidizing pollutant and at least one atmospheric reducing pollutant, whereby the at least one atmospheric oxidizing pollutant is reduced by a combination of the trap material and at least one trapped atmospheric reducing pollutant, which is consequently oxidized.