The Applications Of Modified Porous Materials In Flavoring And CO Reduction Of Cigarette

According to the Chinese cigarettes Technology Development Program, the development direction of "Chinese cigarettes" is“high flavor, low tar, low hazard”. In this article, porous materials were modified to flavor and reduce CO in cigarette to meet the requriments.In flavoingr part, dihydroactinidiolide and geranylacetone were added, aluminum silicate, montmorillonite and MCM-41 are adsorbents. Previous studies have found that many adsorbents’ adsorption amount can meet the requirements, but due to the strong binding force, it is difficult to desorb. In this experiment, the adsorbents were modified by loading glucose and then carbonizing. The results showed that after modified, acidic group increased and basic group reduced.Desorption activation energy of flavor on the modified sorbent decreased,which means the methd can lessen the bingdig force between flavor and adsorbents.It is easy for flavor to desorb.In CO reduction part, Cu Cl@ACs were prepared by two methods. The adsorption capacities were measured in dynamic and static. The effects of pretreatment, loading, calcination temperature and time on the adsorption capacities were discussed respectively.In using Cu(I) to make Cu Cl@AC, Cu Cl was directly supported on AC. Results showed that as Cu Cl loading increased, the BET surface area decreased and the CO adsorption capacity increased then decreased,which reached 50cm3/g at the Cu Cl loading of 1.2; the isosteric adsorption heats of CO on 1.2Cu Cl@AC increased greatly,which means stronger bingding force between CO and 1.2Cu Cl@AC.In using Cu(II) to make Cu Cl@AC, copper chloride and copper formate were precursor.The results show that optimum calcination temperature was 350 ℃and optimum calcination time was 2h. Considering the actual effect and cost, using Cu(I) to make Cu Cl@AC is more practical.