通过KOH激活的基于煤的活性炭对NO减少的研究:性能和机制
Hui Fu1, Junfeng Zhang1, Lingkui Zhao1
1College of Environmental and Resources, Xiangtan University, Xiangtan, 411105, PR China.
这项研究开发了以煤为基础的活性炭 (CAC),用于无氨的NOx去除. 优化的CAC在330-500°C之间表现出100%的NO转换效率,为传统方法提供了可持续的替代方案.
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:
- 使用氨的选择性催化还原 (SCR) 是NOx去除的标准,但受到氨泄漏和狭窄的操作温度的影响.
- 开发替代性,高效和安全的NOx减少技术对于环境保护至关重要.
研究的目的:
- 为了研究通过KOH激活制备的基于煤的活性炭 (CAC),作为一种无氨的减少剂来去除NO.
- 为了优化制备条件 (KOH:煤比和激活温度) 以提高De-NOx性能.
主要方法:
- 煤在不同质量比 (0-3:1) 和温度 (700-900°C) 的KOH激活.
- 评估De-NOx性能,包括NO转换效率和SO2电阻.
- 使用BET,SEM,XRD,Raman,FT-IR和XPS进行表征,以分析结构和化学特性.
主要成果:
- 优化的CAC (CAC-1:1-700) 在330-500°C之间90分钟实现了100%的NO转换效率.
- 优化的CAC表现出了出色的脱性能和SO2抵抗性.
- KOH激活增强了无形碳含量,孔隙结构和C(O) 功能组,这对于脱至关重要.
结论:
- 用KOH激活的CAC是一种有希望的,无氨的替代方案,用于在中等温度范围内和复杂的烟气条件下减轻NOx.
- 该研究阐明了涉及氧气吸附和活性碳部位的反应机制.
- 这种方法为环境应用提供了高价值的煤炭资源利用.
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