云南烟叶加热状态下的失重及产物释放特性的热重一质谱联用分析

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Abstract： [Purpose] To investigate the weight loss and product release behavior of tobacco leaves under heating condition. [Methods] Thermogravimetric-mass spectrometry （TG-MS） was used to study the thermogravimetric characteristics of Yunnan C3F tobacco leaves under 400°C ， and a kinetic analysis of the stages in the thermogravimetric process was conducted， examining the effects of glycerol on the weight of tobacco leaves and the release of products.[Results] 1） The application of glycerol decreased the maximum rate and water loss of the dehydration stage of non-isothermal drying，increased the maximum weight loss rate and loss rate of the volatile precipitation stage，decreased the initial release temperature of flavor substances，and increased the comprehensive heat release index. 2） The dehydration process could be described by the non-isothermal Page drying model， and the addition of glycerol increased the drying activation energy. The pyrolytic reaction during the volatilization precipitation and the thermal decomposition process of hemicellulose and celllose conformed to the F1.5 chemical reaction model， and the addition of glycerol reduced the activation energy in this two stages， indicating that glycerol increased the thermal decomposition reactivity of tobacco.3） Glycerol enhanced the release amount of components such as nicotine， which was beneficial to promote the process of pyrolysis reaction and the release of pyrosis products. [Conclusion] The application of glycerol has an obvious effects on the weight loss process and component release of tobacco raw materials under heating. TG-MS can provide method support for the analysis of weight loss and product release of tobacco leaves.

Keywords： tobacco leaves; thermogravimetric analysis; kinetics; thermogravimetric-mass spectrometry （TG-MS）

全球控烟环境日趋严峻，消费者对吸烟与健康问题的关注度也在逐渐增加，加热卷烟在降低烟气有害成分释放量的同时能提供适度的生理满足感，已逐渐成为新型烟草制品领域中的关注热点[1-2]。（剩余9817字）