RSOS ESM Raman.zip from Characterization of biocarbon generated by high- and low-temperature pyrolysis of soy hulls and coffee chaff: for polymer composite applications

The physical properties of biocarbon vary widely with the biomass used, and the temperature and duration of pyrolysis. This study identifies the effects of feedstock characteristics and pyrolysis conditions on the production of biocarbon and the corresponding properties for industrial applications. For coffee chaff and soy hulls, ash content and carbon content increased with pyrolysis temperature and duration. Ash content increased thermal conductivity and specific heat, and decreased electrical conductivity. Change in surface area with pyrolysis conditions was dependent on type of feedstock. Increased surface area corresponded with increased thermal and electrical conductivity. Increased carbon content corresponded with increased graphitization and thermal stability and decreased surface functionality. Properties of soy hull biocarbons were found to be similar to the properties of other biocarbons with industrial applications such as incorporation into polymer composites.

生物炭（biocarbon）的物理性质会因所用生物质原料、热解温度及热解时长的差异而呈现显著变化。本研究阐明了原料特性与热解条件对生物炭制备过程及其工业应用相关性能的影响规律。针对咖啡糠与大豆豆皮两种原料，其灰分含量与碳含量均随热解温度升高、热解时长延长而升高。灰分含量的提升可提高热导率与比热容，同时降低电导率。比表面积随热解条件的变化规律取决于原料种类。比表面积的提升与热导率、电导率的升高呈正相关关系。碳含量的提升则对应着石墨化程度与热稳定性的增强，以及表面官能团特性的降低。研究表明，大豆豆皮基生物炭的性能与其他具备工业应用价值的生物炭性能相近，例如可将其掺入聚合物复合材料中使用。