Beech Wood Pyrolysis in Polyethylene Melt as a Means of Enhancing Levoglucosan and Methoxyphenol Production
Beech Wood Pyrolysis in Polyethylene Melt as a Means of Enhancing Levoglucosan and Methoxyphenol Production
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DOI：
10.1038/s41598-018-37146-w
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发表时间：
2019-02
影响因子：
4.6
通讯作者：
S. Kumagai;Kohei Fujita;Yusuke Takahashi;Y. Nakai;T. Kameda;Yuko Saito;T. Yoshioka
中科院分区：
文献类型：
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作者：
S. Kumagai;Kohei Fujita;Yusuke Takahashi;Y. Nakai;T. Kameda;Yuko Saito;T. Yoshioka
回收城市和工业废物中的木材/塑料复合材料目前是一个需要克服的挑战。在这项工作中，我们考虑了木材/塑料混合物中木材和塑料的独立热解的概念，以实现能够从两种组分生产可回收最终产品的通用催化工艺设计。为了揭示塑料对木材热解的影响，在聚乙烯（PE）熔体（聚烯烃材料）中在350 °C下进行山毛榉木材（BW，木材材料）的热解。热重分析、产物回收研究、原位表征和显微分析的组合使用揭示了PE熔体对BW热解的影响。更具体地，观察到物理防止在液/固相中的分子间缩合和从PE热解物中夺取氢。这些相互作用提高了生产的左旋葡聚糖和甲氧基苯酚的因素分别为1.7和1.4，在BW热解在PE熔体。基于这些结果，我们得出结论，所观察到的协同效应可能会控制有用产品的产量和质量，以及混合木材/塑料废物的利用，这些废物无法有效地回收利用。
Recycling wood/plastic composites in municipal and industrial wastes currently represents a challenge which needs to be overcome. In this work, we considered the concept of independent pyrolysis of wood and plastic in wood/plastic mixtures for enabling a versatile catalytic process design which is capable of producing recoverable final products from both components. In order to reveal the influence of plastic on wood pyrolysis, the pyrolysis of beech wood (BW, wood material) in a polyethylene (PE) melt (polyolefin material) was performed at 350 °C. The combined use of thermogravimetric analysis, product recovery studies,in situradical characterisations, and microscopic analysis revealed the influence of the PE melt on the BW pyrolysis. More specifically, a physical prevention of the intermolecular condensation and hydrogen abstraction from PE pyrolysates in the liquid/solid phase was observed. These interactions enhanced the production of levoglucosan and methoxyphenols by factors of 1.7 and 1.4, respectively, during the BW pyrolysis in the PE melt. Based on these results, we concluded that the observed synergistic effects could potentially control the yield and quality of useful products, as well as the utilisation of mixed wood/plastic wastes, which cannot be effectively recycled otherwise.