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杨木与竹子共热解的研究
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Abstract:
本文通过热重分析仪研究了竹粉与杨木粉共混物的热解特性，并对其动力学进行了分析。结果表明，杨木和竹子的热解过程均主要分为三个阶段。竹粉的添加使得样品的起始热解温度以及最大热解速率对应温度向低温区移动，这说明半纤维素和纤维素的热解阶段，二者存在协同作用。在200℃~500℃，二者混合无法明显降低热解活化能。此外，当杨木含量较高时，热解的残炭量逐渐下降，而杨木含量较低时，残炭量变化不大。
In this paper, the pyrolysis characteristics of bamboo powder, poplar powder and their mixture were studied by a thermogravimetric analyzer, and their kinetics were analyzed. The results showed that the pyrolysis processes of poplar and bamboo were mainly divided into three stages. With the continuous increase of the amount of bamboo powder added, the initial pyrolysis temperature of the mixture and the corresponding temperature of the maximum pyrolysis rate gradually moved to the low-temperature region, which indicated that there was a synergistic effect between the two in the pyrolysis stage of hemicellulose and cellulose. At 200？C~500？C, the mixing of the two could not significantly reduce the pyrolysis activation energy. In addition, when the poplar content was high, the pyrolysis carbon residue gradually decreased, while when the poplar content was low, the carbon residue changed little.
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