几种烟草薄片的性能及热裂解产物分析

Analysis of Properties and Pyrolysis Products of Several Reconstituted Tobacco Sheets

关键词:  烟草薄片  化学组分  热失重特性  热裂解特性  致香成分  有害成分

Key Words:reconstituted tobacco sheet  chemical components  thermogravimetric characteristics  pyrolysis characteristics  aroma components  harmful components

摘要:本研究对10种烟草薄片样品（9种国产，1种进口）的化学组分首次进行全面系统的分析和对比。结果表明，烟草薄片的化学组分（热水抽出物含量、总糖含量、还原糖含量、总植物碱含量、总氮含量和灰分含量）存在不同程度的差异，因此其相应的热失重特性和热裂解成分存在差异。利用热重/差示扫描量热法对烟草薄片样品在空气氛围下的质量损失特性进行了分析和对比，研究表明，10种烟草薄片各个阶段的质量损失差别不大，但质量损失对应的温度及最大质量损失速率不同，最终生物炭收率差别较大（8.52%～18.09%）；利用热裂解-气相色谱/质谱联用（Py-GC/MS）技术分析了烟草薄片样品的热裂解特性，在对热裂解产物进行全面分析的基础上，筛选出了其中的关键致香成分（3-甲基-1,2-环戊二酮、D-柠檬烯、正十六酸、2-甲氧基苯酚、丙三醇、2-甲氧基-4-乙烯基苯酚和亚麻油酸）和有害成分（丙酮、对甲苯酚、醋酸、甲苯和苯酚）。

Abstract:The chemical components of 10 kinds of reconstituted tobacco sheets （9 kinds of domestic tobacco sheets， one kind of abroad tobacco sheet） were analyzed and compared systematically for the first time in this study， and the results showed that the chemical components（hot water extract，total sugar， reducing sugar， total alkaloids， total nitrogen and ash） were different， which led to the differences of thermogravimetric characteristics and pyrolysis components. Then， the mass loss characteristics of the above reconstituted tobacco sheets in air atmosphere were analyzed and compared by thermogravimetry/differential scanning calorimetry. The results showed that the weight loss rates of different reconstituted tobacco sheets in different stages had little difference， but the temperature corresponding to the mass loss rate and maximum weight loss rate were different； in addition， the final biochar yield was significantly different （8.52%～18.09%）.Py-GC/MS was used to analyze the pyrolysis products of the reconstituted tobacco sheets and the key aroma components （3-methyl-12-cyclopentadiene， D-limonene， n-hexadecanoic acid， 2-methoxyphenol， glycerol， 2-methoxy-4-vinyl phenol and linoleic acid） and harmful components （acetone， p-cresol， acetic acid， toluene and phenol） were also analyzed and filtrated.