黄斑污染物对卷烟纸热解燃烧特性及反应动力学的影响

Effect of Potential Macular Staining on the Pyrolysis/Combustion Characteristics and Reaction Kinetics of Cigarette Paper

关键词:  卷烟纸  污染物  热解/燃烧  动力学  主成分分析

Key Words:cigarette paper  staining  pyrolysis/combustion  kinetic  principal component analysis

摘要:采用热重分析技术研究黄斑污染物对卷烟纸热解和燃烧特性的影响，利用Coats-Redfern 法对比不同污染物侵染卷烟纸热解和燃烧主要质量损失阶段的动力学差异，并基于热重数据的主成分分析，探索区分不同污染物的可行性。结果表明，不同污染物在卷烟纸纤维表面的附着形态不同，各卷烟纸的热解和燃烧过程均可分为4个主要质量损失阶段。其中在热解质量损失过程中，润滑脂类污染物可提高纤维素分解阶段的终止温度和质量损失率，并降低木质素分解及焦炭形成阶段的质量损失率；在燃烧质量损失过程中，润滑脂类污染物显著降低了卷烟纸的引燃温度和燃尽温度，润滑脂类和香精糖料污染物对综合燃烧特性指数的影响趋势相反；热分解动力学显示，不同污染物均会降低热分解反应活化能，尤其是润滑脂类改变了卷烟纸热分解过程的反应机理函数，并显著降低了反应活化能；基于热解和燃烧质量损失数据的主成分分析显示，润滑脂类和香精糖料侵染的卷烟纸能够与原始卷烟纸有效区分。

Abstract:The effect of staining on the pyrolysis and combustion characteristic of cigarette paper was studied by using thermogravimetric technique. The Coats-Redfern method was employed to compare the kinetic differences in the main weight loss stages of pyrolysis and combustion process of cigarette paper contaminated with different staining. And principal component analysis was conducted based on the thermogravimetric data to explore the feasibility of distinguishing different staining. The results showed that different staining exhibited different adhesion form on the fiber surface of cigarette paper. The pyrolysis and combustion process of each cigarette paper could be divided into four main stages of weight loss. In the pyrolytic process， grease staining could increase the termination temperature and weight loss rate of cellulose decomposition stage， and reduce the weight loss rate of lignin decomposition and coke formation stage. In the combustion process， grease staining significantly reduced the ignition temperature and burnout temperature of cigarette paper. In addition， an opposite effect on the comprehensive combustion characteristics index was observed by grease and flavor contaminants. Thermal decomposition kinetics showed that all the tested staining could reduce the activation energy of thermal decomposition reaction， especially for the grease staining， which changed the reaction mechanism of the thermal decomposition process of cigarette paper. And the reaction activation energy was significantly reduced by grease staining. The principal component analysis based on the pyrolysis and combustion weight loss data showed that the cigarette paper contaminated with grease and flavor/sugar could be effectively distinguished from the original cigarette paper.