在自然来源的活性炭中工程和氧功能,用于多元组件气体吸附
Xiupeng Cheng1, Zhipeng Qie2,3, Huaizhong Xiang4,5
1College of Mechanical and Energy Engineering, Beijing University of Technology, Beijing, 100124, China.
Scientific reports
|August 2, 2025
概括
添加活性炭 (ACs) 显示了增强的气体吸附. 优化和氧功能组,特别是酸和/基组,是二氧化碳和H2O捕获的关键,而石墨有利于托洛吸附.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 兴奋剂增强活性炭 (AC) 的气体吸附性能.
- 有限的研究存在于ACs的同时N和O功能组进化,特别是来自富含氧的前体.
- 煤炭衍生AC为功能化提供了一个有前途的平台.
研究的目的:
- 通过K2CO3辅助激活和胺共火解,从煤中合成添加活性炭 (NAC).
- 调查兴奋剂温度对N和O功能群的影响,以及它们对CO2,H2O和烯吸附的影响.
- 建立一个合理的设计策略,用于多元组件气体吸附在AC用于烟气处理.
主要方法:
- 使用K2CO3对煤炭进行物理激活,以产生面积大的交流电.
- 通过与胺在600-900°C的温度下进行联合热解来进行兴奋剂.
- 表面积,毛孔体积和表面功能组 (N和O) 的表征.
- 对CO2,H2O和的气体吸附实验.
主要成果:
- 合成的AC表现出高表面积 (高达940 m2/g) 和微孔体积 (0.36 cm3/g).
- 根据兴奋剂温度,含量在1.44%至7.68%之间,氧含量在6.89%至10.39%之间.
- 一个平衡的N和O功能,包括pyrrolic,以太和基,增强CO2和H2O吸附 (NAC-600).
- 较高的兴奋剂温度 (NAC-900) 有利于多烯吸附,这是由于石墨化和石墨N/基的增加.
结论:
- 对于选择性气体吸附而言,N和O功能群的分布,而不仅仅是孔隙性,是至关重要的.
- 在NAC-600中优化的表面化学显著改善了CO2和H2O吸收.
- NAC-900显示出卓越的多烯吸附能力,突出显示了石墨结构的作用.
- 这项研究为设计复杂的烟气组合的先进AC提供了一条途径.
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