论文部分内容阅读
为提升卷烟综合品质和降低卷烟危害,采用辊压法再造烟叶加工工艺,制备了一种纤维素基释烟材料(CSRM),同时利用热重-GC/MS和微燃烧量热仪(MCC)对CSRM、烤烟(FCT)及再造烟叶(CRT)样品的燃烧热解特性进行对比研究,并考察了将其掺入卷烟后对主流烟气和感官质量等方面的影响.结果表明:①CSRM在600 ℃以下的热失重速率明显低于FCT和CRT,其残留质量远大于FCT和CRT.CSRM在主反应阶段(140~600 ℃)特征温度点下的热解产物在种类和释放量上均低于FCT和CRT.②活化能分布特征表明,碳酸钙增加了CSRM在特定转化率区间(30%~65%)的反应难度.③MCC数据显示,相比于FCT和CRT,CSRM的易燃性和燃烧性更差.④将CSRM以一定比例掺配入卷烟后,能显著降低焦油及主流烟气中有害成分的释放量;当添加比例为8%~10%时,能有效改善卷烟感官品质.在相同的掺配比例(10%)下,CSRM在选择性降低烟气有害成分和提升感官品质方面均优于CRT.“,”A cellulose-based smoke releasing material (CSRM) was prepared by a rolling processing technology used in reconstituted tobacco in order to improve overall quality of cigarette and reduce harmfulness of smoking. Experimental investigations on combustion and pyrolysis characteristics of CSRM, a flue-cured tobacco (FCT) and a cut reconstituted tobacco (CRT) were conducted by thermogravimetry (TG)-GC/MS and micro-combustion calorimeter (MCC) techniques. CRSM was also blended and made into cigarettes, and its effects on mainstream smoke chemistry and sensory quality of the cigarette were studied. The results showed that: 1) The weight loss rate of CSRM was much lower than those of FCT and CRT heated below 600 ℃, while the residual mass of CSRM was much higher than those of FCT and CRT. The pyrolysis products of CSRM at the characteristic main reaction stage (140-600 ℃) were lower than those of FCT and CRT in terms of the number of the species and their amounts. 2) The characteristics of activation energy distribution indicated that calcium carbonate suppressed the reaction of CSRM in the conversion rate interval of 30%-65%. 3) MCC data revealed that CSRM had the lowest flammability and combustibility comparing with FCT and CRT. 4) CSRM could effectively reduce the releases of tar and other harmful components in mainstream cigarette smoke at a certain blending ratio. CSRM also improved the sensory quality of the cigarette at the blending ratio of 8%-10%. At the blending ratio of 10%, CSRM was superior to CRT in selectively reducing certain harmful components in mainstream smoke and improving sensory quality of cigarette.