烘焙条件对生物油蒸馏残渣理化性质及气化活性的影响  

INFLUENCE OF TORREFACTION CONDITIONS ON PHYSICOCHEMICAL PROPERTY AND GASIFICATION REACTIVITY OF BIO-OIL DISTILLATION RESIDUE

作　　者：黄一滔 刁瑞 王储 朱锡锋 Huang Yitao;Diao Rui;Wang Chu;Zhu Xifeng(School of Engineering Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学工程科学学院,合肥230026

出　　处：《太阳能学报》2023年第6期523-531,共9页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划(2018YFB1501404)。

摘　　要：利用傅里叶变换红外光谱仪(FT-IR)和X射线衍射仪(XRD)探究烘焙预处理技术对生物油蒸馏残渣理化性质的影响,并通过热重分析仪(TGA)表征生物油蒸馏残渣及其烘焙样品的气化活性和动力学演变。结果表明,250℃的烘焙温度能提升样品中烃类和芳香类物质的含量,225℃的烘焙温度有利于样品气化活性的提升。当烘焙滞留时间为1 h时,样品内芳香结构呈无序态,表现出更强的气化活性。烘焙气氛对生物油蒸馏残渣气化活性影响较小,但会显著改变官能团组成,空气气氛可明显增加样品内羟基含量,并抑制烃基和芳香类物质的生成。二氧化碳气氛可增加烃基含量,而氮气气氛下样品生成更多大芳环结构。此外,通过3种动力学模型对样品气化动力学分析,结果表明3种模型均能较好地模拟出各类样品的气化曲线,其中随机孔隙模型的拟合效果最好。The effect of torrefaction technique on physicochemical properties and carbonaceous structures of bio-oil distillation residues was investigated by Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD),and a thermogravimetric analyzer(TGA)was used to characterized the gasification reactivity and kinetic evaluation of samples.The results indicate that torrefaction temperature at 250℃enhances the content of hydrocarbons and aromatics,and torrefaction temperature at 225℃is conducive to increasing the gasification reactivity of samples.When torrefaction residence time is 1 h,the aromatic structures in the sample is disordered,showing a stronger gasification reactivity.Torrefaction atmospheres affects the gasification reactivity of samples slightly,but has a significant influence on the composition of the functional groups.Air atmosphere increases the content of hydroxyl groups and reduces the content of hydrocarbon groups,and inhibits the generation of aromatics.CO2 atmosphere increases the hydrocarbon content,and N2 atmosphere induces the formation of more large aromatic rings.Furthermore,the sample gasification kinetics is analyzed by three kinetic models.It indicates that the simulated gasification curves of various sample under three models fits experimental data well,among which RPM fits best.

关 键 词：生物质 蒸馏残渣 生物油 理化性质 气化活性 动力学分析 

分 类 号：TK6[动力工程及工程热物理—生物能]