改性活性焦炭:一种高容量且易于设计的Hg0吸附剂,用于燃煤燃烧的烟气
Yang Zheng1, Lin Zhang1, Xiaocong Wang1
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, , Beijing, 100083, China.
概括
在活性焦炭吸附剂上的新型铜化物有效地从烟气中去除了80%以上的 (Hg0). 这种材料显示出高效率和耐硫性,为控制污染提供了有前途的解决方案.
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:
- 燃煤发电厂的排放带来了重大的环境风险.
- 现有的控制技术面临脱硫和二次释放的挑战.
- 米纳马塔公约要求采取更严格的污染控制措施.
研究的目的:
- 开发一种具有成本效益和高效的吸附剂,用于从烟气中去除.
- 为了研究在活性焦炭上支持的金属化物的性能,以捕获.
- 了解吸附的机制和吸附剂对硫的抵抗.
主要方法:
- 合成四种金属化物 (铜,铁,,锡) 装入活性焦炭 (AC).
- 实验评估 (Hg0) 的吸附效率,最佳温度和吸附率.
- 在含硫大气中对吸附剂性能进行评估.
- 合成吸附剂的物理化学表征,使用SEM和元素分析等技术.
主要成果:
- 活性焦炭 (CuSe/AC) 上的铜化物在120分钟后实现了超过80%的Hg0去除效率.
- 最佳吸附温度窗口被确定为30-120°C.
- Se/AC表现出极好的抗硫性,有效性仅下降5.2%.
- 鉴定结果显示,类似纳米板的CuSe负载具有接近1:1的Cu-to-Se原子比.
结论:
- CuSe/AC是一种高效和强大的吸附剂,用于从烟气中捕获Hg0.
- Hg0对联体不和Se-位点的高选择性是其性能和耐硫性的关键.
- 这种功能化的活性焦炭吸附剂为工业污染控制应用提供了强有力的理论支持.
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