摘要
采用热重分析仪以10、20、30℃／min的温升速率对王草进行了热解特性实验,以20℃／min的温升速率进行了燃烧特性实验,得到热解与燃烧的特性参数。通过动力学分析得到热解与燃烧的活化能等动力学参数。研究结果表明, 王草的热解过程可分为3个阶段:预热干燥阶段、挥发分析出阶段、碳化阶段,热解失重主要发生在挥发分析出阶段。随着温升速率的上升,王草各热解特征温度都有所升高。王草燃烧曲线有2个明显的失重过程,存在二次着火现象。王草燃烧差热(DTA)曲线后面放热峰明显大于前面的放热峰, 表明固定碳燃烧放热量大于挥发分燃烧放热量。实验结果可以为王草的能源化利用提供指导。
With a thermogravimetric analysis apparatus, pyrolysis characteristic experiments of King grass were done at different heating rates, which were 10, 20 and 30℃/min, and the combustion characteristic experiment was done at 20℃/min heating rate. Then the characteristic parameters were obtained by above experiments. The activation energy of pyrolysis and combustion were acquired by kinetics analysis . The results show that the pyrolysis process of King grass includes three phases, which are heating and desiccation phase, volatile compounds release phase and carbonization phase. Main weight loss takes place in volatile compounds release phase. When the heating rate increases, all pyrolysis characteristic temperatures of King grass rise. There are two obvious weight loss processes in combustion curve of King grass, and twice ignition happens in combustion process of King grass. Latter summit of differential thermal analysis （DTA） curve of King grass combustion is higher than former, which indicates that heat output of the fixed carbon combustion is higher than volatile compounds combustion. The experimental results can provide direction for utilization of King grass as an energy resource.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第11期65-69,共5页
Proceedings of the CSEE
关键词
生物质
热重分析
热解特性
燃烧特性
biomass
thermogravimetric analysis
pyrolysis characteristic
combustion characteristic
