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AssigneePhilip Morris USA Inc.
InventorsRangaraj S. Sundar, Sarojini Deevi
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A component of a cigarette comprises a silver-based catalyst for the conversion of carbon monoxide to carbon dioxide. The silver-based catalyst comprises particles (e.g., nanoscale or larger sized particles) of metallic silver and/or silver oxide supported in and/or on metal oxide support particles. The silver-based catalyst can be incorporated into a cigarette component such as tobacco cut filler, cigarette paper and cigarette filter material to reduce the concentration of carbon monoxide in the mainstream smoke of a cigarette during smoking. The catalyst can also be used in non-cigarette applications.
A component of a cigarette comprising a particulate catalyst for the conversion of carbon monoxide to carbon dioxide, wherein the catalyst comprises agglomerates of nanoscale particles comprising silver and/or silver oxide supported in and/or on support particles of cerium oxide, wherein the component is selected from the group consisting of tobacco cut filler, cigarette paper and cigarette filter material, and wherein the catalyst has been heat treated under conditions which provide a light off temperature of not more than 100° C. in a gas flow consisting of 3% CO, 21% O2 and balance argon, wherein the light off temperature is a temperature for 5% CO conversion.
Dependencies are inferred from the claim text.