Growth mechanism of glucose-based hydrochar under the effects of acid and temperature regulation

Journal of Colloid and Interface Science 2023

Growth mechanism of glucose-based hydrochar under the effects of acid and temperature regulation

Jian Peng , Xiheng Kang , Siyu Zhao , Peitao Zhao , Arthur J. Ragauskas   , Chuanling Si , Ting Xu , Xueping Song*

摘要：Improving the tailorability of hydrochar synthesis is an effective way to enhance its performance and utilization efficiency. In this study, the growth rate, morphology, and molecular structure of hydrochar were controlled by regulating the pH and temperature of the hydrothermal carbonization process. Growth process analysis indicates that hydrochar has three growth periods: induction, rapid, and stable growth periods. It is mainly controlled by 5-hydroxymethylfurfural (HMF), which is formed by converting glucose and its transformation products. The regulation of acid can significantly shorten the induction period of hydrochar, even under low-temperature conditionstemperature   (160–220 ℃); whereas the regulation of acid reduced it and increased the content of oxygen-containing functional groups on the hydrochar surface. Based on these results, it is proposed that hydrochar formation has five stages and three growth periods with or without acid regulation.

DOI：https://doi.org/10.1016/j.jcis.2022.10.044