现场 DRIFTS 洞察生物炭在热空气氧化过程中的表面功能的演变
Zhuozhuo Sun1, Haiqin Zhou1, Jianhua Hou2
1Key Laboratory of Development and Application of Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, 610041, China; Research Center for Rural Energy and Ecology, Chinese Academy of Agricultural Sciences, Chengdu, 610041, Sichuan, China.
Journal of environmental management
|September 19, 2024
概括
热空气氧化 (TAO) 显著改变生物炭表面的功能,形成氧化功能群 (OFG). 生物炭的特性受到制备温度和内在矿物质的影响,指导工程生物炭设计以改善应用.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
背景情况:
- 生物炭表面的功能对于其多样化的应用至关重要.
- 了解热空气氧化 (TAO) 如何改变生物炭表面对于优化其使用至关重要.
- 现场调查提供了对氧化过程中表面变化的直接见解.
研究的目的:
- 研究热空气氧化 (TAO) 过程中生物炭表面功能的演变.
- 为了确定制备温度和内在矿物质对TAO诱导的表面变化的影响.
- 探索TAO在工程生物炭特性方面的潜力.
主要方法:
- 在现场扩散反射红外里埃变换光谱 (DRIFTS) 监测表面功能组.
- 热重力测量分析 (TGA) 用于评估质量变化和热稳定性.
- 在不同温度和不同内在矿物质含量下制备的生物炭的分析.
主要成果:
- TAO导致生物炭表面功能的显著变化,通过O2化学吸收形成氧化功能组 (OFG),即使在质量稳定的低温下也是如此.
- 生物炭制备温度影响TAO结果:高温生物炭具有更强的抗性,有利于基的形成,而低/中温生物炭则有利于高达400°C的炭基/乳基.
- 生物炭中的内在矿物质催化TAO,增加质量损失,但提高TAO适用于含矿物质的生物炭的适用性.
结论:
- TAO是一种修改生物炭表面功能的有效方法,可以创建特定的氧化功能组.
- 生物炭制备条件和固有的矿物质含量显著决定了对TAO的反应.
- 泰奥为设计工程生物炭提供了一条用于增强应用的定制性质的途径.
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