摘要
为研究烟草样品在热重分析过程中释放出的产物,搭建了一种热重分析产物收集装置,并分别利用GC/MS和HPLC法分析了烤烟样品在不同热失重阶段释放出的焦油态产物以及甲醛、乙醛、丙酮、丙烯醛和丙醛5种挥发性羰基物。结果表明:1烤烟样品的热分解过程大致可分为吸附水散失、挥发性成分析出、烟草生物聚合物热氧化裂解、焦炭燃烧和燃尽5个热失重阶段。2在不同热失重阶段,焦油态产物的生成明显不同,其中,挥发性成分析出阶段会导致大量烟碱和许多香味成分形成;在生物聚合物的热氧化裂解阶段,焦油态产物的数量最丰富;而在焦炭燃烧阶段会产生许多芳烃类化合物。3烟草热解过程产生的挥发性羰基物主要是在烟草生物聚合物的有氧裂解及之后的焦炭燃烧过程中形成的。
In order to study the products released during the process of thermogravimetric analysis（TGA） of a tobacco sample, a device for collecting TGA products was established. The tar-form product and five volatile carbonyl compounds（formaldehyde, acetaldehyde, acetone,acrolein and propanal） released at different thermogravimetric stages were collected, then analyzed by GC/MS and HPLC separately. The results showed that： 1） The pyrolysis process of tobacco samples could be divided into five stages, i.e. adsorbed water dissipation, volatile component evolution, bio-polymer thermal oxidative pyrolysis, coke combustion, and burnout stages. 2） At different thermogravimetric stages, the formation of tar-form products was obviously different; large amount of nicotine and a great number of aroma compounds formed at volatile component evolution stage; abundant tar-form products formed at bio-polymer thermal oxidative pyrolysis stage; and many aromatic compounds produced at coke combustion stage. 3）The volatile carbonyl compounds mainly formed at bio-polymer oxidative pyrolysis and coke combustion stages.
出处
《烟草科技》
EI
CAS
CSCD
北大核心
2015年第3期66-73,共8页
Tobacco Science & Technology
基金
安徽中烟工业有限责任公司科技计划资助项目"离线热分析联用技术的构建及其在烟草研究中的应用"(20111007)
