含有氧的功能组与FeOx/OAC的Fe位相结合,克服了脱硫活性和再生性能之间的权衡
Simi Li1, Mouli Liu1, Yan Huang1
1College of Environment and Resources, Xiangtan University, Xiangtan, 411105, PR China; Hunan Provincial Environmental Protection of Engineering Technology Center of Air Complex Pollution Control (XTU), Xiangtan, 411105, PR China.
Journal of environmental management
|May 2, 2025
概括
我们在活性炭上开发了含有氧的功能组,并将Fe位点合在活性炭上,以加强二氧化硫的去除和低温再生. 这种方法可以将SO2容量提高75%并提高可再生性,克服热再生方面的挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 金属氧化物增强了碳材料的SO2去除.
- 稳定的金属硫酸盐阻碍了活性部位的低温再生.
研究的目的:
- 制定一项战略,以改善碳基吸附剂的SO2去除活动和再生能力.
- 研究含氧功能组 (OCFG) 和氧化铁位点对增强脱硫和再生的协同效应.
主要方法:
- 用氧功能化的活性碳支持铁氧氧化物 (FeO_x/OAC) 与特定的OCFG (-COOH,C=O/C-OH) 的制造.
- 使用了全面的表征技术和密度函数理论 (DFT) 计算.
- 进行了脱硫再生 (S-R) 循环试验.
主要成果:
- 与OCFG结合的Fe位点增强了SO2氧化和Fe2(SO4) 3分解.
- -COOH组促进了Fe3+的定,并为SO2氧化产生氧气空位.
- C=O/C-OH组降低了Fe2(SO4) 3的分解能量,使其在400°C时能有效再生.
- 优化的FeO_x/OAC显示,SO2容量增加了75%,并在5个循环中保持了90%以上的硫回收.
结论:
- 开发的FeO_x/OAC与合的OCFGs和Fe站点提供了卓越的SO2去除和低温可再生性.
- OCFG和Fe站点之间的协同作用对于提高性能至关重要.
- 这项研究为设计先进的吸附剂提供了一个框架,以有效地回收硫资源.
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