Cigarettes and cigarette filters including activated carbon for removing nitric oxide
AssigneePhilip Morris USA Inc.
InventorsWei-Jun Zhang, Mark Zhuang, Shahryar Rabiei, Firooz Rasouli
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Abstract
Filters and cigarettes include an activated carbon sorbent capable of selectively removing nitric oxide from mainstream tobacco smoke. Methods for making cigarette filters and cigarettes using the activated carbon sorbent and methods for treating mainstream tobacco smoke produced by smoking a cigarette comprising the sorbent are also provided.
Claims10
A cigarette filter comprising an activated carbon sorbent, wherein a majority of the pores of the activated carbon sorbent have a size of less than about 30 Å, the activated carbon sorbent contains pores having a D-R micropore volume of from about 0.2 cm3/g to about 1.0 cm3/g in the pore size range of from about 5 Å to about 10 Å and pores having a D-R micropore volume of from 0.33 cm3/g to 0.61 cm3/g in the pore size range of from 10 Å to 20 Å, and the activated carbon sorbent is capable of removing nitric oxide from mainstream tobacco smoke, wherein the activated carbon sorbent is in the form of spherical beads.
Dependencies are inferred from the claim text.