对再生脱催化剂的结构强化技术的研究
Dongliang Ji1, Dongxue Jiang2, Yang Li3
1College of Environment and Ecology, Jiangsu Open University, Nanjing, 210036, China.
Physical chemistry chemical physics : PCCP
|December 11, 2023
概括
使用硫酸的消耗选择性催化降解 (SCR) 催化剂的再生显著改善了结构强度和活性. 这种具有成本效益的方法为烟气脱提供了可持续的解决方案,减少了危险废物.
科学领域:
- 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.
- 环境科学 环境科学
背景情况:
- 与替换和处置失败的选择性催化降解 (SCR) 催化剂作为危险废物相关的高成本.
- 通过回收和再生使用的SCR催化剂来降低烟气脱的成本.
- 现有挑战:再生的SCR催化剂的结构强度和活性不足以有效使用.
研究的目的:
- 研究使用二酸,酸和硫酸作为再生SCR催化剂的强化剂.
- 为了比较不同的制备技术,包括过度浸,鼓声辅助浸和超声波辅助制备.
- 确定影响再生催化剂结构强度,物理性质和催化活性的因素.
主要方法:
- 使用三种不同的基于的强化剂再生SCR催化剂.
- 三种浸泡技术的比较:过度浸泡,鼓声辅助浸泡和超声波辅助制备.
- 对再生催化剂特性进行分析:压力强度,磨损率,H2-TPR,NH3-TPD,以及in situ IR光谱.
主要成果:
- 在16%的硫酸溶液中进行鼓式辅助浸,产生了最好的结果.
- 达到4.57 MPa的压力强度和0.088%的磨损率.
- 经过10分钟,化效率达到58%,表明催化活性有所改善.
结论:
- 硫酸是再生SCR催化剂的有效增强剂,显著提高结构完整性和性能.
- 鼓式辅助浸是一种优越的技术,可以提高催化剂的性能.
- 结合活动和结构强化的协同方法对于开发先进的再生SCR催化剂至关重要.
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