Summary of article on activated carbon and cat odor:
Activated carbon:
Has a capacity for virtually any vapor contaminant. It will adsorb some of almost any vapor;
Has a large capacity for organic molecules, especially solvents;
Will adsorb and retain a wide variety of chemicals at the same time;
Has an extremely large capacity to destroy ozone catalytically. Ozone is a major component of smog;Works well under a wide range of temperature and humidity conditions;
Adsorbs odors and chemicals preferentially to moisture. It is not a desiccant and will release moisture to adsorb chemicals;
Can be used as a carrier of one material to attract and hold or react with another material;