|Cite this article as:|
|Chunmei Yu, Shan Ren, Guangwei Wang, Junjun Xu, Haipeng Teng, Tao Li, Chunchao Huang, and Chuan Wang, Kinetic analysis and modeling of maize straw hydrochar combustion using multi-Gaussian-distributed activation energy model, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2305-3|
This study investigates hydrochar combustion kinetics using a multi-Gaussian-distributed activation energy model (DAEM) to expand knowledge on combustion mechanisms. The results demonstrate that the kinetic parameters calculated by the multi-Gaussian-DAEM accurately represented the experimental conversion rate curves. Overall, the feedstock combustion could be divided into four stages: the decomposition of hemicellulose, cellulose, lignin, and char combustion. The hydrochar combustion could in turn be divided into three stages: the combustion of cellulose, lignin, and char. The mean activation energy ranges obtained for the cellulose, lignin, and char of the hydrochar were 273.7–292.8, 301.6–334.5, and 355.2–365.1 kJ/mol, respectively, with standard deviations of 2.1–23.1, 9.5–27.4, and 12.1–22.9 kJ/mol, respectively. The cellulose and lignin contents first increased and then decreased with increasing hydrothermal carbonization (HTC) temperature, while the mass fraction of char gradually increased.