摘要
为了研究农作物秸秆在微波辐照下的热解特性,采用定制的微波加热装置,进行了整包秸秆的微波热解试验,并对秸秆微波热解的产物和能耗进行了考察。结果表明,微波加热过程中料包内部温度分布均匀,升温迅速。微波输入功率是影响加热过程的关键因素,同时料包内部的传热传质对温度分布也有重要影响。微波加热会引发秸秆的热解反应,气体产物主要由氢气、一氧化碳、甲烷和二氧化碳等组成,通过氮吸附方法和扫描电镜分析,得到了固体产物的比表面积、孔容和孔径。微波热解电耗较大,应该合理选择微波功率和物料处理量,以提高经济性。该文结果可为农作物秸秆的资源化利用提供基础性资料。
The characteristics of microwave pyrolysis of straw bale were studied using a microwave furnace and the composition of pyrolytic products and energy consumption analysis were also carried out. The results state that temperature distribution inside the bale is uniform and temperature rises quickly after microwave heating. Microwave input power is a key factor for microwave heating process, but heat and mass transfer inside straw bale have important influences on temperature distribution. Pyrolysis can be initiated by microwave heating, and the gaseous products are mainly composed of hydrogen, carbon monoxide, methane, carbon dioxide, etc. Analysis of solid products was also carried out by scanning electron microscopy （SEM） and N2 absorption method and the specific surface area, pore volume and pore diameter were obtained. Energy consumption of microwave pyrolysis is large, which can be improved by selecting suitable microwave power and the size of straw bale. Those results obtained from microwave pyrolysis provide foundational data for the new utilization of crop straw resources.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第10期210-214,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金项目资助(50906047)
高等学校博士学科点专项科研基金(200804221027)
关键词
热解
秸秆
温度分布
微波
能耗
pyrolysis
straw
temperature distribution
microwave
energy consumption
