摘要
采用热重分析仪研究稻壳、松木屑和玉米秸秆在热解终温600℃下的热解过程,并运用TG-FTIR研究其热解过程中挥发分气体的析出规律。结果表明:随热解温度升高,其热解反应固体残余率逐渐减少,产量具有较为明显的差异:稻壳(41.8%)>玉米秸秆(29.3%)>松木屑(20.8%)。有机气体在FTIR图谱中主要集中在1 000~2 000cm^(-1),醛类和酸类是吸光度峰值最大的气相产物。生物质热解油的主要形成阶段主要集中在300~520℃,为增大生物质热解油产量,最佳制油温度应控制在450℃左右。分别运用DAEM和F-W-O法对10、20、30、50℃/min下松木屑的热解进行动力学计算,求解的平均活化能分别为144.92kJ/mol和146.01kJ/mol,当转化率达到0.70时,对应的热解温度为450℃左右。
The pyrolysis process of the rice husk, pine sawdust and corn stover were studied in a thermogravimetric analysis instrument under the 600℃ pyrolysis temperature, and the on line TG-FTIR technology was used to analyze the volatile release characteristics of biomass pyrolysis. The results show that the solid residue rate decreased with the pyrolysis temperature increased. The production has obvious difference, rice husk（41.8%）〉corn stover（29.3%）〉pine sawdust（20.8%）.FTIR spectra of the organic gas mainly between 1000-2000cm^-1,aldehydes and acids are gas products with the biggest absorbance peak. The formation of biomass pyrolysis oil mainly happened in 300-520℃.In order to increase the production of biomass pyrolysis oil, the best system oil temperature should be controlled at about 450℃.Respectively using the method of DAEM and F-W-O on the pine sawdust pyrolysis dynamics calculation at the 10,20,30,50℃/min heating rate, and the average activation energy were 144.92 kJ/mol and 146.01 kJ/mol. When the conversion rate is 0.70,the corresponding pyrolysis temperature is about 450℃.
出处
《林产工业》
北大核心
2015年第9期36-40,47,共6页
China Forest Products Industry
关键词
生物质
热解终温
析出特性
动力学
TG-FTIR
Biomass
Final pyrolysis temperature
Release characteristics
Kinetics
TG-FTIR
