Study Of Porous Materials For Flavor Storage And Release In Cigarette

China national tobacco industry is implementing the strategy of “harm reducing andaroma retention” to further enhance and improve the cigarette quality. Among varied flavoringtechnologies, filter added adsorbent technonlogy has become a most active one resent years,for its advantages of pure flavor and high storage/release controllability. In this technology,the adsorbent plays a key role, which asks people to develop or select right adsorbents thatcan meet the requirements of offering a certain amount of adsorption and releasing spicesufficiently when the flue gas goes through. This paper carried out researchs of developingsuitable materials for sweet flavors, which has strong realistic significant to improve thequality of Chinese cigarette.The paper had used the experimental methods of static adsorption, suction desorption andtemperature programming technology, and studied different sweet flavors’ adsorption anddesorption performance on six porous materials, which includes1#activated carbon,4#activated carbon, MCM-41, SBA-15, montmorillonite and aluminum. The main progressesare as follows:1) Completed the measure of three flavors’ adsorption amount in four activated carbons,The result showed that: the flavor adsorption amount on activated carbons arrangedfrom big to small are Trimethylpyrazine> Phenylethanol> Ethyl Vanillin; theadsorption amount increased with the flavors’ dipole moment decreased; theadsorption amount increased with the acidic groups increased on activated carbonsurface.2) Completed the three flavors’ TPD experiments and its simulated desorptionexperiments on four activated carbons, the results showed that: The DesorptionActivation Energy decreased with the flavors’ molecule-diameter decreased; TheDesorption Activation Energy increased with the flavors’ electronegativity decreased;the flavors’ desorption rate increased with the Desorption Activation Energydecreased.3) To1#activated carbon and4#activated carbon, its Phenylethanol adsorption amountincreased after carbonizated modification, which has reached200mg/g, Besides, The Desorption Activation Energy of Phenylethanol in these two activated carbondecreased after carbonizated modification; Phenylethanol’s desorption rate on1#activated carbon and4#activated carbon after modifing with HCL are72.41%and78.53%, which had met the requirement of above70%.4) Carried out the simulated desorption experiments with flavors on adsorbents undernegative pressure condition, the results showed that: the desorption rates ofDihydroactinidiolide in six porous materials were all above70%; the desorption ratesof Geranyl acetone in three porous materials contained SBA-15, montmorillonite andaluminum were near70%; and the desorption rates of Phenylethanol in six porousmaterials arranged from45%-65%.