基于纤维素的生物炭的形成机制的新见解
Xiheng Kang1, Zi You1, Yongheng Huang1
1Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi, 530004, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|March 25, 2025
概括
酸 (FA) 和5-基甲基 (5-HMF) 在纤维素的热水碳化过程中促进生物炭的形成. 醇 (F) 和酸 (LA) 抑制它,FA为可控制的生物炭生产提供了一条新的途径.
科学领域:
- 生物质转换生物质转换
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 纤维素的热水碳化 (HTC) 是生产生物炭的关键过程.
- 纤维素水解剂对生物炭形成的影响仍然不太清楚,阻碍了可控合成.
- 主要的纤维素水解剂包括5-基甲基 (5-HMF), (F),酸 (FA) 和酸 (LA).
研究的目的:
- 调查主要纤维素水解剂在HTC过程中生物炭形成中的独特作用.
- 阐明这些化物与生物炭前体的相互作用机制.
- 为可控制备基于纤维素的生物炭提供见解.
主要方法:
- 使用5-HMF及其与F,FA和LA的混合物作为通过HTC合成生物炭的前体.
- 在碳化过程中监测反应剂消耗率.
- 分析由此产生的生物炭产品的物理化学特性.
主要成果:
- 发现5-Hydroxymethylfurfural (5-HMF) 和酸 (FA) 可以促进生物炭的形成.
- 鉴定出 (F) 和酸 (LA) 是生物炭形成的抑制剂.
- 酸 (FA) 通过减少体颗粒聚合,增强生物炭沉,并通过表面反应增加氧含量 (O/C = 0.39).
结论:
- 酸 (FA) 在通过新的相互作用途径促进生物炭形成方面发挥着至关重要的作用.
- 这项研究揭示了关键纤维素水解剂对生物炭产量和性质的特定促进和抑制作用.
- 这些发现为通过热水碳化优化基于纤维素的生物炭生产提供了新的视角.
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