燃料化学学报2016，Vol.44Issue(9)：1066-1073,8.
低阶煤半焦利用热重在O2/CO2、O2/N2和O2/Ar气氛下燃烧特性研究
Combustion characteristics of low-rank coal chars in O2/CO2, O2/N2 and O2/Ar by TGA
摘要
Abstract
The combustion reactivity of two chars prepared from two low-rank coals in Northwest China were studied using a thermogravimetric analyzer ( TGA ) . The effects of different atmospheres ( O2/CO2 , O2/N2 and O2/Ar ) and different oxygen concentrations on the combustion characteristics were investigated. The results indicate that both atmosphere and oxygen concentration show effectiveness on combustion of char. Compared with N2 and Ar, CO2 could significantly promote the reaction. When combustion atmosphere changes from O2/CO2 to O2/Ar, the burnout temperature increases by 63. 7 and 68. 8℃ for the two chars respectively. Meanwhile, when the combustion atmosphere changes from O2/CO2 to O2/N2 , that is 135. 9 and 129. 6 ℃, respectively. An increase in concentration of oxygen can also improve the combustion performance of chars in the test. At the same time, kinetic analysis of the combustion profiles of the chars reveals that both the apparent activation energy E and the pre-exponential factor A increased with increasing oxygen concentration and the compensation effect exists between activation energy E and pre-exponential factor A of chars’ combustion.关键词
低阶煤半焦/燃烧特性/热重分析法/O2/N2/O2/CO2 和O2/Ar气氛/不同氧气浓度/动力学分析Key words
low-rank coal char/combustion characteristic/thermogravimetric analysis/O2/N2 , O2/CO2 and O2/Ar atmosphere/different oxygen concentration/kinetics analysis分类
化学化工引用本文复制引用
沈国栋,王志奇,武景丽,何涛,李建青,杨静,吴晋沪..低阶煤半焦利用热重在O2/CO2、O2/N2和O2/Ar气氛下燃烧特性研究[J].燃料化学学报,2016,44(9):1066-1073,8.基金项目
The project was supported by Strategic Pilot Scientific &Technological Project of Chinese Academy of Sciences (XDA0705100).中国科学院战略先导科技专项(XDA0705100)资助 （XDA0705100）
