生物质燃烧的气体产物及动力学分析  

Composition of gaseous products and kinetic analyses of biomass combustion

作　　者：林鹏[1] 罗永浩[1] 虞亚辉[1] 陈祎[1] 段佳[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《可再生能源》2008年第1期35-39,共5页Renewable Energy Resources

基　　金：上海市科学技术委员会资助基金(05dz12010);上海市科学技术委员会"十大登山行动计划"资助基金(06DZ12206)

摘　　要：采用热重分析法对3种生物质样品进行燃烧特性试验,并利用质谱仪在线监测了燃烧排放的部分气体成分。对生物质样品进行燃烧反应动力学分析,得到相关的表观活化能及指前因子。研究结果表明:燃烧过程可以分为3个温度阶段:①吸附水的析出及铵盐的热分解(室温～150℃);②半纤维素、纤维素及部分木质素的热解(150～350℃);③木质素的热解及焦炭的燃烧(350～600℃)。利用质谱仪在线监测了CH4,NH3,H2O,CO2,NOX等气体产物,其质谱曲线与对应的热重曲线相符合,也验证了各反应阶段的假设。The experiments on the combustion characteristic of three kinds biomass sample are carried out by thermogravimetric analysis, and some gas components are examined using on-line mass spectrometry. The apparent activation energy and preexponential factor are obtained by kinetic analysis. The results show that there are 3 temperature ranges in the combustion process： Ⅰ, the process of desorption of moisture and decomposition of ammonium salts （room temperature-150 ℃ ）; Ⅱ, the process of devolatilization of hemi cellulose, cellulose and part of lignin （150-350 ℃ ）; Ⅲ, the process of devolatilization of lignin and char combustion （350-600 ℃）. The gaseous products of CH4,NH3, H2O,CO2,NOx are examined by on-line mass spectrometry, the mass spectrometry curves match with the TG curvos very well, and assumptions of three ranges were validated.

关 键 词：生物质 热重-质谱 动力学 

分 类 号：TK6[动力工程及工程热物理—生物能] TK16