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通过水热碳化,改善了从污泥中分离炭的固体/液体的性能
Journal of environmental management
|October 8, 2023
概括
水热碳化 (HTC) 通过增强脱水和降低过阻力,改善了从污泥中分离水电. 这通过碳水化合物和蛋白质分解来实现,这降低了粒子的水友性,并提高了较低的加热值.
科学领域:
- 生物质转化和生物能源
- 材料科学与工程 材料科学与工程
- 环境科学与技术 环境科学与技术
背景情况:
- 固体-液体分离对于通过水热碳化 (HTC) 从生物质中利用碳元素至关重要.
- 由于其成分,由泥衍生出的化具有独特的分离挑战.
研究的目的:
- 使用HTC. 评估从焦化污泥 (CS) 和市政污泥 (MS) 获得的碳化合物的固体-液体分离性能.
- 阐明控制化物分离和脱水能力的机制性见解.
主要方法:
- 在不同温度下对CS和MS的水热碳化 (HTC).
- 分析酸盐脱水效应和过阻力.
- 碳化合物表面功能组和有机元件的表征.
主要成果:
- HTC显著提高了酸盐分离,较高的温度改善了脱水 (53.25%在CS,77.05%在MS) 和降低了过阻力.
- 由碳水化合物分解 (180°C) 和蛋白质分解 (210-300°C) 驱动的受限水释放是改善脱水的关键.
- 由于消除水友群和形成芳香结构,减少颗粒的水友性对分离效率比颗粒大小更为关键.
- 碳化合物的较低加热值显著增加,表明燃料质量有所提高.
结论:
- HTC是一种有效的方法,可以改善从污泥中分离化物固体液体.
- 了解结合水释放和水友性变化的作用,为优化HTC流程提供了机械洞察力.
- 这些发现支持加强利用污泥衍生炭作为一种有价值的能源资源.
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