多聚磷酸铵对再造烟叶热解行为与CO释放量的影响

应用热重分析研究多聚磷酸铵（APP）对再造烟叶热解行为的影响．热分析结果表明，APP降低再造烟叶热降解速率及其热释放量、促进了碳的形成，对再造烟叶的热降解起一定的阻碍作用．此外APP显著影响再造烟叶的热解过程中的气相产物，再造烟叶的CO单支释放量与单口释放量随着APP含量的增加快速下降．慢速热解与闪解实验结果显示升温速率是APP降低C0释放的关键因素。

Influence of Ammonium Polyphosphate on Thermal Decomposition of Reconstituted Tobacco and CO Evolution

The thermal behaviors and burning characteristics of reconstituted tobacco （RT） are strongly related with evolved gaseous products. The effect of ammonium polyphosphate （APP） as an additive of RT on the pyrolysis behavior and CO evolution was studied, emphasizing the role of heating velocity in reducing CO delivery of the mainstream smoke by APP. Thermogravimetric analysis （TGA） was employed to investigate the influence of APP on RT thermal behavior. Slow and flash pyrolysis of RT were compared to discuss the role of heating rate in decreasing CO by APP. TGA results demonstrated that, in dependence on APP concentration, APP influenced exothermal amount and weight loss rate during RT thermal decomposition, promoted the formation of char and retarded the thermal decomposition of RT. In addition, APP had a considerable influence on the evolution of gaseous products during thermal decomposition of RT. Both CO delivery per cigarette and that per puff in the smoking process were significantly reduced in dependence on APP content in RT. Comparative analysis of CO evolution patterns in the flash and slow pyrolysis elucidated that heating rate played a key role in decreasing CO evolution by APP. The results suggest that APP is a potential burning additive for controlling CO delivery in mainstream smoke of RT.