烟草科技2016，Vol.49Issue(12)：71-78,8.DOI:10.16135/j.issn1002-0861.2015.0684
基于分布活化能模型的烟草燃烧动力学特性研究
Study on kinetic characteristics of combustion behaviors of flue-cured tobacco based on distributed activation energy model
王昭 1戴亚 2马扩彦 1朱立军 1王学斌1
作者信息
- 1. 重庆中烟工业有限责任公司技术研发中心，重庆市南岸区南坪东路2号宏声大厦 400060
- 2. 西安交通大学能源与动力工程学院热能工程系，西安市咸宁西路28号 710049
- 折叠
摘要
Abstract
To study the kinetic characteristics of combustion behaviors of flue-cured tobacco,the influences of stalk position of tobacco leaf,oxygen concentration and heating rate on the combustion process of flue-cured tobacco were investigated via thermogravimetric experiments,and the kinetics parameters of combustion of middle leaves were obtained by distributed activation energy model (DAEM). The results showed that:1) Within the oxygen concentration of 0-10%,the increase of oxygen concentration slightly influenced the process of volatile component evolution,but significantly improved the semi-coke combustion process of tobacco. 2) The increase of heating rate caused the mass loss profile of tobacco shifted towards a higher temperature region, it was not beneficial to the ignition and burnout of tobacco. 3) The variation curves of apparent activation energy Ea(α)along with the cause of reaction and the distribution function of activation energy f(E)of middle leaves at the oxygen concentrations of 0,5% and 10% were obtained;Ea(α)first increased and then decreased in mass loss process generally,and f(E) did not present obvious gaussian distribution characteristics. The distribution of activation energy of tobacco differed in different atmospheres,and a remarkable kinetic compensation effect was observed at the second stage (volatile non-polymeric component release and partial tobacco polymer decomposition)and the fourth stage(semi-coke combustion)of tobacco combustion process.关键词
热重分析/烟叶/分布活化能模型/燃烧动力学特性/烤烟Key words
Thermogravimetric analysis/Tobacco leaf/Distributed activation energy model/Kinetic characteristic of combustion behavior/Flue-cured tobacco分类
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王昭,戴亚,马扩彦,朱立军,王学斌..基于分布活化能模型的烟草燃烧动力学特性研究[J].烟草科技,2016,49(12):71-78,8.
