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通过抑制方法合成的亚微米吸收剂去除SO3:产品层像平行峰一样生长
Hang Yu1, Chengpeng Wang1, Heng Chen2
1Key Laboratory of Energy Thermal Conversion and Control of Ministry Education, School of Energy and Environment, Southeast University, Nanjing, China.
Journal of hazardous materials
|August 28, 2024
概括
微米以下的氧化有效地将三氧化硫 (SO3) 从烟气中去除. 这种新的合成方法提高了电厂中的SO3吸收效率和吸附剂转换.
科学领域:
- 环境化学环境化学
- 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:
- 商业氧化 (Ca(OH) 2用于去除三氧化硫 (SO3),但由于颗粒大小和效率低而受到影响.
- 现有的SO3捕获方法受到吸收性质和研磨挑战的限制.
研究的目的:
- 合成微微米级的氧化,以提升从烟气中去除SO3.
- 在试点规模的设置中研究亚微米Ca (OH) 2的性能和机制.
- 在SO3捕获过程中探索吸附动力学和化学相互作用.
主要方法:
- 微米以下的氧化用抑制方法与甲基酸盐合成.
- 在试点规模平台 (120 Nm3/h) 上进行性能评估.
- 使用固定床实验,密度函数理论 (DFT) 和原子力显微镜 (AFM) 的分析.
主要成果:
- 使用100毫克/升的藻酸盐,从13.66微米减少到0.84微米的Ca (OH) 2颗粒大小.
- 实现了92.1%的SO3去除效率,并改善了吸收转换.
- 通过DFT通过Ca(OH) 2确认了SO3的化学吸附,吸附是由Ca-p和O-s轨道杂交驱动的.
结论:
- 微微小的Ca (OH) 2为从烟气中去除SO3提供了一个有效的解决方案.
- 该研究阐明了气体固体反应中的岛屿生长机制.
- 为开发工业应用的先进亚微米吸收剂提供参考.
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