Hydrothermal co-carbonization of industrial biowastes with lignite toward modified hydrochar production: Synergistic effects and structural characteristics
文献类型： 外文期刊
第一作者： Zhan, Hao
作者： Zhan, Hao;Zeng, Zhiyong;Zhang, Shihui;Song, Yanpei;Zhan, Hao;Wang, Xinming;Chang, Guozhang
作者机构：
关键词： Hydrothermal co-carbonization (co-HTC); Upgrading; Denitrogenation; Industrial biowastes; Lignite coal; Synergy
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.968； 五年影响因子：7.317 ）
ISSN： 2213-2929
年卷期： 2022 年 10 卷 3 期
页码：
收录情况： SCI
摘要： Attempts to prepare high-grade and clean solid fuels from biowastes and low-rank coals are essential for protecting the environment and utilizing the energy from low-grade resources. The improvement of hydrothermal carbonization (HTC) and co-carbonization (co-HTC) on the upgrading and denitrogenation capabilities of industrial biowastes with low-rank coal as lignite (LC) was evaluated at 120-300 degrees C. The results demonstrated that coupled upgrading and denitrogenation occurred with a more intense effect on industrial biowastes than LC during the HTC process. For co-HTC in the prevailing hydrolysis (180 degrees C) or polymerization (240 degrees C) stage, an optimal mixing ratio of industrial biowaste/LC of 1:1-3:1 could result in an enhanced experimental calorific value, energy recovery efficiency, nitrogen removal efficiency, and weakened experimental nitrogen content, demonstrating the significant positive synergies on both upgrading and denitrogenation capabilities. The corresponding synergistic coefficients were maximized at 7% and - 23% for the calorific value and nitrogen content of hydrochars, respectively. The combined analyses of XPS, C-13 NMR, and FTIR could provide evidence that these synergies of co-HTC were intrinsically associated with LC: (1) its more stable carbon and nitrogen functionalities; (2) promotion of its components or reaction sites on prevailing hydrolysis and polymerization reactions at corresponding temperature stages.
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