Analysis of Thermogravimetric Characteristics and Stepwise Thermal Release Aroma Components of Different Types of Tobacco

doi:10.15933/j.cnki.1004-3268.2025.03.017

Abstract

Abstract: In order to study the weight loss characteristics and component release characteristics of different types of tobacco leaves in different thermal weight loss temperature ranges，flue⁃cured tobacco，cigar tobacco and burley tobacco were used as the research subjects. By thermogravimetric analysis method and self⁃built programmed temperature control heating platform coupled with flue gas capture device，the thermal weight loss characteristics of different types of tobacco leaves and the heat release products under stepwise heating conditions were compared and analyzed.The results showed that the thermal weight loss process of different types of tobacco leaves could be divided into four stages，but the thermal weight loss characteristic parameters of each sample were different.The weight loss rate and maximum weight loss rate of flue⁃cured tobacco in stage Ⅱ were high，the initial decomposition temperature of cigar tobacco and burley tobacco was high，and the final decomposition temperature was low.Flue⁃cured tobacco had lower comprehensive pyrolysis index［9.84×10^⁃5%（/ min·℃²）］and residual mass（28.47%）.The pyrolysis kinetics analysis showed that the activation energy（E_a）and pre⁃exponential factor（A）of flue⁃cured tobacco in stage Ⅱ were higher than those of cigar tobacco and burley tobacco.The Ea value of burley tobacco in stage Ⅲ was higher than that of flue⁃cured tobacco and cigar tobacco，while the E_a value of cigar tobacco in stage Ⅳ was higher than that of flue⁃cured tobacco and burley tobacco. Under the condition of stepwise heating，different types of tobacco leaves showed the highest weight loss rate in the thermal decomposition stage Ⅲ，and the weight loss rate of stage Ⅱ showed flue⁃cured tobacco>cigar tobacco>burley tobacco.The weight loss rate of flue⁃cured tobacco and cigar tobacco in stage Ⅲ was significantly higher than that of burley tobacco（34.60%）.The heat release aroma products of different types of tobacco leaves in each heating stage were significantly different. The total amount of aroma substances released showed cigar tobacco（13 883.48 μg/g）>burley tobacco（11 970.11 μg/g）>flue⁃cured tobacco（8 753.42 μg/g）.The content of aroma substances released in stage Ⅲ accounted for 42.86%，48.68% and 61.85% of the total content，respectively.In summary，the thermal weight loss characteristics and stepwise heat release aroma components of different types of tobacco leaves are different.The type of tobacco raw materials and the heat release components at the corresponding temperature should be considered in the formulation design of cigarette products.

Key words: Tobacco leaves, Stepwise pyrolysis, Thermogravimetric analysis, Pyrolysis characteristics, Aroma compound

摘要： 为研究不同类型烟叶在不同热失重温度区间的失重特性和成分释放特征，以烤烟、雪茄烟及白肋烟为研究对象，利用热重分析法和自主搭建的程序控温加热平台耦连烟气捕集装置，对比分析不同类型烟叶的热失重特性及分步加热条件下的热释放产物。结果表明，不同类型烟叶的热失重过程均可分为4个阶段，但各样品的热失重特征参数有差异，烤烟在阶段Ⅱ的失重率和最大失重速率偏高，雪茄烟和白肋烟的初始分解温度偏高，而终止分解温度偏低。烤烟具有较低的综合热解指数［9.84×10^-5%/（min·°C²）］和残余质量（28.47%）。热解动力学分析表明，烤烟在阶段Ⅱ的活化能（E_a）和指前因子（A）均高于雪茄烟和白肋烟，白肋烟在阶段Ⅲ的E_a值高于烤烟和雪茄烟，而雪茄烟在阶段Ⅳ的E_a值高于烤烟和白肋烟。分步加热条件下，不同类型烟叶均在热分解阶段Ⅲ表现出最高的失重速率，阶段Ⅱ的失重率表现为烤烟>雪茄烟>白肋烟，烤烟和雪茄烟在阶段Ⅲ的失重率明显高于白肋烟（34.60%）。不同类型烟叶在各加热阶段的热释放香味产物差异明显，香味物质释放总量表现为雪茄烟（13 883.48 μg/g）>白肋烟（11 970.11 μg/g）>烤烟（8 753.42 μg/g），其中阶段Ⅲ释放的香味物质含量分别占总含量的42.86%、48.68%和61.85%。综上，不同类型烟叶的热失重特性及分步热释放香味成分具有差异性，卷烟产品配方设计时应考虑烟叶原料类型及对应温度的热释放成分。

关键词: 烟叶, 分步热解, 热重分析, 热解特性, 香味成分

CLC Number:

LIANG Miao, LIU Yuxuan, ZHU Haibo, SU Man, ZHENG Yongjie, XIE Yifei, JIANG Xi, ZHANG Junsong, ZHU Yuanyang. Analysis of Thermogravimetric Characteristics and Stepwise Thermal Release Aroma Components of Different Types of Tobacco[J]. Journal of Henan Agricultural Sciences, 2025, 54(3): 157-169.

梁淼, 刘语煊, 朱海波, 苏曼, 郑永杰, 谢一飞, 姜希, 张峻松, 朱远洋. 不同类型烟叶热失重特性及分步热释放香味成分分析[J]. 河南农业科学, 2025, 54(3): 157-169.

Figures/Tables 14

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