Biomass pyrolysis for oil production results in biochar byproduct, whose characteristics can be improved by the reuse of waste plastics. While the plastic recycling process leads to a large amount of plastic waste that cannot be reused, this underutilized feedstock holds the potential for coprocessing with biomass, thereby increasing the likelihood of producing valuable biochar products. This study sought to evaluate how the inclusion of plastic waste influences the pyrolysis of biomass residue. To this end, sawdust and hardwood biomass were chosen as materials to investigate how the presence of plastics might alter the properties of the resulting chars. Synergies were observed among the biomass components, particularly in samples with higher lignin content from hardwood biomass, which resulted in increased biochar yields. The results showed that a 20% blend of plastic waste with wood at 300°C produced a solid char with a yield of 40% by weight. Co-pyrolysis of the biochar derived from blends of 20 wt. % PP with both sawdust and hardwood resulted in significant enhancement of various properties of the resulting biochar, including surface area, carbon content, hydrophobicity, and aromaticity. This enhancement had a favorable effect on the carbon content and calorific values of the biochar. These enhanced properties significantly contributed to the biochar’s capacity for sorbing substances like various heavy metals. It can be proved that this result showed the importance of the energy content of biochar and its potential use for renewable applications. The beneficial combined effect seen in the plastic blends can be credited to the interaction between the biomass and polymer components, resulting in the production of fewer volatile products at higher temperatures. It can be suggested that biochar from biowaste and plastic waste not only reduces environmental impact but also converts it into a valuable and eco-friendly product.

中文翻译：

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通过回收处理后的生物质残留物与塑料废物的共热解提高生物炭产量

生物质热解用于石油生产会产生生物炭副产品，其特性可以通过废塑料的再利用来改善。虽然塑料回收过程会产生大量无法重复利用的塑料废物，但这种未充分利用的原料具有与生物质协同处理的潜力，从而增加了生产有价值的生物炭产品的可能性。本研究旨在评估塑料废物的含量如何影响生物质残留物的热解。为此，选择锯末和硬木生物质作为材料，以研究塑料的存在如何改变所得炭的特性。在生物质成分之间观察到协同作用，特别是在来自硬木生物质的木质素含量较高的样品中，这导致生物炭产量增加。结果表明，20% 的塑料废物与木材的混合物在 300°C 下产生的固体炭的产率为 40%（按重量计）。源自 20 wt.% 混合物的生物炭的共热解。 % PP 与锯末和硬木的混合导致了所得生物炭的各种性能的显着增强，包括表面积、碳含量、疏水性和芳香性。这种增强对生物炭的碳含量和热值有有利的影响。这些增强的特性极大地提高了生物炭吸附各种重金属等物质的能力。可以证明，这一结果表明了生物炭能量含量的重要性及其在可再生应用中的潜在用途。塑料共混物中所见的有益综合效应可归因于生物质和聚合物成分之间的相互作用，从而在较高温度下产生较少的挥发性产品。可以说，来自生物废物和塑料废物的生物炭不仅可以减少对环境的影响，而且可以将其转化为有价值的环保产品。