超微孔氨化生物炭的单步 Pyrolytic 合成,用于二氧化碳捕获
Che-Jung Hsu1, I-Lin Kuo2, Hsing-Cheng Hsi3
1Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 811532, Taiwan.
Journal of environmental management
|April 5, 2025
概括
来自侵入性 Leucaena leucocephala 的氨化生物炭有效捕获二氧化碳 (CO2). 这种增强的生物炭具有很高的吸附能力,为温室气体减排提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 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:
- 二氧化碳 (CO2) 是推动全球变暖的主要温室气体,人类活动是主要来源.
- 在源头直接捕获二氧化碳对于减少排放至关重要.
- 生物炭是一种有前途的二氧化碳吸收剂,但它的容量在低压下是有限的,需要修改.
研究的目的:
- 开发一种增强的生物炭材料,以改善二氧化碳吸附.
- 为了研究来自Leucaena leucocephala的氨化生物炭的二氧化碳捕获潜力.
- 为了将生物炭特性与二氧化碳吸附性能相关联.
主要方法:
- 莱奥卡纳 leucocephala 生物质通过热解和氨化转化为氨化生物炭 (ABC).
- 生物炭表面积,孔隙结构 (BET,微孔,超微孔) 和含量的表征.
- 进行了二氧化碳吸附实验,并使用Langmuir-Freundlich和伪二次模型分析了吸附等温和和动力学.
主要成果:
- 在800°C (ABC800) 生产的氨化生物炭表现出高表面积 (836.5 m2/g),显著的微度 (753.3 m2/g) 和超微度 (376.9 m2/g).
- 在0°C时,ABC800的CO2吸附能力高达4.06mmol/g.
- 吸附遵循兰格穆尔-弗朗德利希和伪二阶动力学,表明吸附和化学吸附机制.
结论:
- 合成的氨化生物炭 (ABC800) 显示出出色的二氧化碳捕获能力.
- ABC800的孔隙结构和含量是其高吸附性能的关键因素.
- 本研究提出了一种利用改性生物炭捕获二氧化碳的可持续方法,有可能在高温下应用.
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