Effects of Glycerol on Thermal Property and Smoke Release of Tobacco Leaves Under Heating

In order to investigate the effects of glycerol addition on the release of tobacco smoke under a heating condition, the samples of cut tobacco at different glycerol addition rates were analyzed by differential scanning calorimetry(DSC) and thermogravimetric-differential thermogravimetric(TG-DTG) analysis, and the release of smoke particulate matter, nicotine, moisture and tar of the samples heated in an in-house heating device at 200-400℃ were determined. The results showed that: 1) Glycerol addition increased the percentage of tobacco mass loss at low temperature, raised tobacco ignition temperature, decreased its combustibility.2) The release of smoke particulate matter and nicotine increased with the increase of glycerol addition rate(0-10%), but did not change obviously as glycerol addition rate over 10%. The release of tar increased significantly at the glycerol addition rate ranging between 10% and 15%, the increment of tar attributed mainly to the release of glycerol. 3) The moisture release significantly increased after adding glycerol. No distinct difference of moisture release was found at different glycerol addition rates(5%, 10% and 15%). In summary, glycerol additiondecreases the combustibility, increases the smoke release of tobacco during heating.