以4种生物质(野生狸藻、荞麦壳、玉米秸秆、柳树枝)为研究对象,利用差热-热重分析仪(TG-DTG)进行热重分析,考虑不同升温速率对热解反应的影响,通过分析TG-DTG曲线探讨生物质的热解特性,运用Coats-Redfern分析法进行动力学计算,得到4种生物质的热解活化能(E)。结果表明:随着升温速率的增加,热解反应出现热滞后现象;n=1的动力学模型能很好地描述4种生物质的热解过程,4种生物质的活化能大小:E荞麦壳>E柳树枝>E玉米秸秆>E野生狸藻;综合分析得出野生狸藻的热解特性最差,荞麦壳效果最好。
The effects of different heating rate on the pyrolysis process were studied by using four kinds of biomass (wild fir algae,buckwheat shell,corn stalk,willow branch) with SHIMADZU DTG-60 differential thermal-thermogravimetric analysis instrument.The TG-DTG curve was used to study the pyrolysis characteristics of biomass.Coats-Redfern analysis was used to calculate the pyrolysis activation energy of four kinds of biomass.The results showed that the kinetic model of n=1 can describe the pyrolysis of four kinds of biomass and the activation energy of four kinds of biomass:Ebuckwheat shell>Ewillow branches>Ecorn stalks>Ewild fir algae.The comprehensive analysis showed that the pyrolysis characteristics of wild raccoon were the worst and the buckwheat husk was the best.
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基金资助
四川省教育厅科研项目(17ZB0402);西昌市教育和科学技术局项目(16JSYJ04);凉山州人社局项目(ZXS201705)
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