摘要
为揭示颗粒型加热卷烟烟芯材料热解与烟气释放规律,采用湿法造粒技术,利用热重-红外联用装置(TG-FTIR)与锥型量热仪(CONE),探究了烟叶原料种类对其热解与释烟特性的影响规律。结果表明:①不同种类烟叶原料制备的烟草颗粒失重过程基本一致,相较于烤烟颗粒而言,梗丝、再造烟叶、白肋烟、雪茄烟和香料烟制备的烟草颗粒最大失重速率温度向低温区偏移,且梗丝颗粒和再造烟叶颗粒易挥发性物质释放阶段的失重速率较大,该阶段烤烟颗粒具有最大失重比例,且热解完成后固体残余量最小。②红外光谱结果显示,不同烟叶原料制备的烟草颗粒气相产物释放过程基本一致,因化学成分的差异使得释放温区范围略有差异。其中碳水化合物、酚类和醇类等含羟基化合物的释放温区主要集中在150~300℃之间;含C=O的羰基、酯类等化合物以及CO释放过程分为两个阶段,分别为250~400℃和500℃左右;当温度超过500℃时,烟草颗粒热解释放出NH_(3)和CH_(4)。③梗丝、再造烟叶以及雪茄烟制备的烟草颗粒的堆积密度约在0.54~0.56 g/cm^(3)之间,相较其他原料而言较小,但烟气释放速率较大,累积释烟总量较高,其中,梗丝颗粒起始释烟速率最大;CO与CO_(2)释放的整体变化趋势与释烟速率曲线变化规律一致,即释烟速率越大,CO与CO_(2)的释放速率越大。
To reveal the characteristics of pyrolysis and smoke release from tobacco section of heated tobacco products,tobacco granules were prepared via wet granulation.The effects of tobacco types on pyrolysis and smoke release of the tobacco granules were studied with thermogravimetric-Fourier transform infrared(TG-FTIR)and cone calorimeter(CONE).The results showed that:1)The weight loss of the tobacco granules prepared from different tobacco materials were similar.Comparing to the tobacco granules prepared from flue-cured tobacco,the highest weight loss rate temperature of those prepared from tobacco stems,reconstituted tobacco,burley,cigar and oriental tobacco shifted towards lower temperature region.The weight loss rates of volatile compounds released from the tobacco granules prepared from tobacco stems and reconstituted tobacco were higher at the weight loss stage.During this stage,the proportion of the weight loss from flue-cured tobacco was the largest with the lowest amount of solid residues after pyrolysis.2)The FTIR spectra indicated that the release of gaseous products from the tobacco granules prepared from different tobacco materials were almost the same,while the release temperature ranges were slightly different due to the differences of chemical components.The temperature ranges at which carbohydrates,phenols,alcohols and other hydroxyl-containing compounds released mainly concentrated in the range of 150-300℃.The releases of carbonyls,esters compounds and CO could be divided into two stages:250-400℃and around 500℃.NH_(3)and CH_(4)were released at temperatures higher than 500℃.3)The bulk densities of the tobacco granules prepared from tobacco stems,reconstituted tobacco and cigar tobacco ranged from 0.54 to 0.56 g/cm^(3);they had higher smoke release rates and higher total smoke release amount although their bulk densities were lower than those made from other tobacco materials.Tobacco granules prepared from tobacco stems had the highest initial smoke release rate.Moreover,the releases of CO and CO_(2)showed a similar trend to that of smoke release rate,i.e.,the higher the smoke release rate,the higher the CO and CO_(2)release rates would be.
作者
曹芸
张劲
王成虎
王鹏
王孝峰
张亚平
周顺
张晓宇
金宇
管明婧
李延岩
CAO Yun;ZHANG Jin;WANG Chenghu;WANG Peng;WANG Xiaofeng;ZHANG Yaping;ZHOU Shun;ZHANG Xiaoyu;JIN Yu;GUAN Mingjing;LI Yanyan(Key Laboratory of Combustion&Pyrolysis Study of CNTC,China Tobacco Anhui Industrial Co.,Ltd.,Hefei 230088,China;Key Laboratory for Tobacco Chemistry of Anhui Province,China Tobacco Anhui Industrial Co.,Ltd.,Hefei 230088,China)
出处
《烟草科技》
CAS
CSCD
北大核心
2022年第4期42-50,共9页
Tobacco Science & Technology
基金
国家烟草专卖局新型烟草制品研制重大专项项目“基于颗粒状烟草物料的电加热不燃烧卷烟产品开发及工艺研究”(110201901007 XX-07)
国家烟草专卖局重点实验室项目“卷烟包灰的燃烧热解基础及应用技术研究”(110201903002)
安徽中烟工业有限责任公司科技项目“新型烟气降温有机/无机复合材料开发及应用研究”(js2019105)和“加热不燃烧烟草颗粒制备技术集成与应用研究”(js2019137)。
关键词
烟草
烟草颗粒
热解
热重-红外光谱联用
锥形量热仪
释烟特性
Tobacco
Tobacco granule
Pyrolysis
Thermogravimetric-Fourier transform infrared(TG-FTIR)
Cone calorimeter
Smoke release