摘要
采用TG-MG技术研究稻秆、稻壳和玉米芯的热解特性。采用活化热解区与消极热解区法、热解特性指数法分析了3种生物质的热解特性,质谱分析重点关注热解过程中不凝性气体和焦油产物的形成。结果表明：（1）含木质素较低的秸秆类生物质在消极区的热解不活跃;在同升温速率下,3种生物质的热解难易程度为：玉米秆〈玉米芯〈稻秆;（2）含氧气体量大大高于烃类和H2,H2O是所有试样中的主要产物;在相同实验条件下,稻秆热解生成H2O最多,而生成焦油量最少;而玉米秆和玉米芯生成少量H2O和大量焦油;对于不可凝性气体产物,CO和CO2是主要的气体产物,而H2和CH4只占小部分;（3）焦油的主要产物为苯、甲苯和苯酚,除苯在550℃后还有析出外,其余芳香烃产物的析出范围均为300℃-550℃。
Pyrolysis characteristics of rice straw,corn straw and corncob were studied with TG-MS analyzer,and the pyrolysis characteristics were analyzed by using active zone and passive zone,pyrolysis index,and the formation process of non-condensable gas and tar were paid close attention to by using MS analysis.The results show that（1） pyrolysis of agriculture residues isn＇t active in passive pyrolysis zone;under the same heating rate,the pyrolysis degree of three materials is corn strawcorncobrice straw;（2） the amount of oxygenated gas is significantly larger than that of hydrocarbon and hydrogen.It was found that H2O is the main product formed larger than that of hydrocarbon and hydrogen.It was found that H2O is the main product formed for all materials.Under the same conditions,rice straw produces the largest amount of H2O and the least amount of tar,while corn straw and corncob is on the contrary.For the non-condensable gas,CO and CO2 is the main gas product,while H2 and CH4 accounts for a small part;（3） the main products of tar are benzene,toluene and phenol.With the exception of benzene that continues to evolve above 550 ℃,all of aromatic compounds evolve over the same temperature range of 300 ℃~550 ℃.
出处
《锅炉技术》
北大核心
2010年第1期64-68,共5页
Boiler Technology
基金
上海市科学技术委员会资助课题(05dz12010)
