摘要
采用德国产NETZSCHSTA449C同步热分析仪,升温速率β=10 K/min、15 K/min、20 K/min和30 K/min,在303 K-973 K间,对稻秆在氮气环境中的热解特性进行实验研究。实验表明,β=15K/min时热解气态产物最多,β=10 K/min时实验反应热最大,差示扫描量热分析(DSC)曲线的峰、谷与微分热重分析(DTG)曲线的峰、谷有着对应关系。提出以453 K为临界温度,以水平直线代替低于临界温度部分的DSC曲线的方法,将实验曲线转换为干生物质DSC曲线。预测了干生物质在热解过程中的反应热,预测结果与稻秆化学成分分布规律对应,证实所提出的预测方法是有效的。
The pyrolytic characteristics of rice stalk at four heating rates （10, 15, 20 and 30 K/min） have been investigated, in a nitrogenous atmosphere within a temperature range of 303 K - 973 K, with a NETSCH STA 449 C simultaneous thermal analyzer of German manufacture. Experimental results show that maximal pyrolytic gas is obtained with β= 15 K/min, while reaction heat gets maximal at β= 10 K/min; peaks and troughs of differential scanning calorimetry （DSC） curves correspond to those of differential thermogravimetry （DTG） curves. A proposal is being rendered to take 453 K as the critical temperature and to substitute that part of the DSC curve below the critical temperature by a horizontal straight line; herewith modifying the experimental curve to represent the DSC curve for dry biomass. The predicted reaction heat of dry biomass pyrolysis corresponds to the distribution of the chemical components and shows the validity of proposed method. Figs 5, tables 4 and refs 4
出处
《动力工程》
EI
CSCD
北大核心
2007年第2期297-300,共4页
Power Engineering
基金
上海市科学技术委员会科研计划项目课题(05dz12010)
关键词
能源系统工程
生物质
热解特性
同步热分析
energy system engineering
biomass
pyrolysis characteristics
simultaneous thermal analysis
