压力气体压力造液体纤维素固体废物:纤维素的脱氧和芳香化机制
Liu Shi1, Yiming Sun1, Xian Li1
1State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Molecules (Basel, Switzerland)
|November 25, 2023
概括
气压 (GP) 烧结方法通过脱氧和芳香化有效地将纤维素分解成纤维素固体废物 (LSW). 这项研究阐明了GP烧结背后的分子机制,揭示了优化废物转化的主要中间化合物和反应.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
- 生物质转换生物质转换
背景情况:
- 新型气体加压 (GP) 烧结实现了高纤维素分解 (90%) 在线纤维素固体废物 (LSW).
- 基底的脱氧和芳香机制的GP torrefaction仍然不清楚.
- 了解这些机制对于优化LSW热转换至关重要.
研究的目的:
- 阐明GP烧烤过程中纤维素的分子水平脱氧和芳香机制.
- 开发和应用分子结构计算方法来研究这些机制.
- 建立一个理论基础,以提高GP烧烤效率.
主要方法:
- 开发了一种分子结构计算方法,用于分析反应通路.
- 在250°C的纯纤维素上进行了GP的化实验.
- 利用传统的特征化技术来分析化产品.
主要成果:
- 在250°C的GP烧烤过程中,细胞质的质量损失为47%,氧气从纤维素中去除的重量为72%.
- 传统的烧烤对纤维素分解的影响很小.
- 确定了2环和3环法兰芳香化合物作为通过脱和聚合形成的关键中间体.
- 氧气的去除主要是通过H2O的形成,在聚合过程中产生CO和有机分子.
结论:
- 通过GP化,有效地去除氧气,并通过特定的脱氧和聚合途径促进纤维素的芳香化.
- 建立了一个脱氧和芳香机制模型.
- 这项研究为优化GP烧结提供了理论指导,并为研究LSW热转换机制提供了一种新方法.
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