Reliable information on the decomposition of polysaccharides is important to evaluate the evolution and properties of hydrothermally carbonized chars. Hyperspectral imaging offers a quick and robust alternative to expensive and time-consuming laboratory methods to determine the polysaccharide contents of biomass and biomass-derived chars. Here, we show that the decomposition of hemicellulose and cellulose were visible in the acquired hyperspectral images even without image calibration. Image regression based on sample holocellulose, glucan and the sum of xylan, galactan, arabinan and mannan provided good calibration models and enabled visualizing the decomposition of polysaccharides based on carbonization temperature. Hyperspectral imaging thus provides a non-destructive alternative to traditional polysaccharide analyses of hydrochars for laboratory and potential future industrial applications.

中文翻译：

---

水热碳化生物质中多糖的空间分辨光谱测定

有关多糖分解的可靠信息对于评估水热碳化的炭的演变和性能很重要。高光谱成像提供了一种快速而强大的替代方法，可替代昂贵且耗时的实验室方法来确定生物质和生物质衍生的焦炭中的多糖含量。在这里，我们表明，即使不进行图像校准，在获得的高光谱图像中也可以看到半纤维素和纤维素的分解。基于样品全纤维素，葡聚糖以及木聚糖，半乳聚糖，阿拉伯聚糖和甘露聚糖的总和的图像回归提供了良好的校准模型，并能够根据碳化温度可视化多糖的分解。