In this study, a novel approach was developed to prepare engineered hydrochar from KMnO₄ treated bamboo residues through hydrothermal carbonization. The hydrochar yields were within a specified range of 61.8–67.8% at 180 °C and 39.8–45.0% at 260 °C, respectively. The higher temperature led to the higher C content, lower H/C and O/C ratio, whereas the ash content increased with increasing KMnO₄ concentration, causing the increase of solid yield as well as the decrease of C content. Pseudo-second kinetic model was optimal to describe bamboo hydrochar’s hygroscopic dynamic, and the engineered hydrochar produced at 260 °C and 1.0 wt% concentration obtained the better hydrophobicity of 0.82%. SEM-EDS and XRD analysis confirmed the existence of manganese carbonate on the surface of engineered hydrochar, from which we inferred the chemical complexation between KMnO₄ and hydrochar.

在这项研究中，开发了一种新颖的方法，可通过水热碳化从KMnO ₄处理过的竹渣中制备工程水煤。在180°C和260°C时，碳氢化合物的收率分别在61.8–67.8％和39.8–45.0％的指定范围内。较高的温度导致较高的C含量，较低的H / C和O / C比，而灰分含量随KMnO _4的增加而增加浓度的增加，导致固体收率的提高以及碳含量的降低。伪秒动力学模型最适合描述竹水炭的吸湿性，在260°C和1.0 wt％的浓度下生产的工程水炭的疏水性更好，为0.82％。SEM-EDS和XRD分析证实了工程水煤油表面存在碳酸锰，由此我们推断出KMnO ₄与水煤油之间的化学络合。