Application of ammonium chloride in charcoal cigarette filter for reducing temperature

In order to enhance activated carbon's ability to reduce harmful smoke components and to reduce the negative influences of activated carbon filters on smoke sensory quality of Virginia type cigarettes, ammonium chloride was applied to cigarette filters as a cooling material. The cooling effect of ammonium chloride in cigarette filter was determined by a thermometer with fast response micro-thermocouples. The activated carbon filters with the cooling effect were prepared by mixing ammonium chloride with activated carbon, and then the mixture was added into cigarette filter. Selected volatile harmful components in cigarette smoke were analyzed by using national and industry standard methods. The particulate phase components in cigarette smoke were analyzed by GC/MS. The results showed that:1) To obtain the same toxicant reducing effect, the amount of activated carbon in cooled activated carbon filters was around 45% less than that in a controlled activated carbon filter. 2) The decrease of activated carbon amount in the cooled activated carbon filter reduced its adsorptions of aroma components in cigarette smoke.