一种数据驱动的方法,用于合成富含N的碳吸附剂的化盐,用于选择性CO2捕获
James N Burrow1, John E Eichler2, Wuilian A Martinez2
1John J. McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.
Advanced materials (Deerfield Beach, Fla.)
|September 5, 2023
概括
使用盐方法合成的富含的纳米多孔碳,对从稀释气体流中捕获的二氧化碳 (CO2) 具有很高的选择性. 这一进步提供了高效的二氧化碳分离,在天然气加工和烟气处理中具有潜在的应用.
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:
- 开发有效的二氧化碳 (CO2) 捕获吸附剂对于缓解气候变化至关重要.
- 盐合成为创建先进的多孔材料提供了一种多功能途径.
- 富含的多孔碳对选择性气体吸附有前途.
研究的目的:
- 应用实验设计,通过盐合成优化含丰富的纳米多孔碳.
- 建立CO2/N2选择性和容量的结构功能关系.
- 评估这些材料在从稀释气体混合物中捕获碳的性能.
主要方法:
- 纳米多孔碳的盐合成.
- 实验设计 (DoE) 方法用于合成优化.
- 物理化学特性和气体吸附性能 (CO2/N2) 的表征.
- 使用模拟的烟气和天然气流进行评估.
主要成果:
- 优化的富含的碳具有出色的CO2/N2选择性 (SIAST = 246) 和显著的CO2容量 (0.73 mmol g-1).
- 在轮结构纳米结构中的尺寸选效应增强了二氧化碳的分离.
- 该材料从4%的二氧化碳流中获得了91%的吸附相纯度.
- 证明了良好的物理化学稳定性,低成本和适度的再生能量.
结论:
- 化盐合成与DoE相结合,使高性能CO2吸附剂的反向设计成为可能.
- 富含的纳米多孔碳为选择性二氧化碳捕获提供了与热利石和MOF相比具有竞争力的替代品.
- 这些材料适用于针对稀释CO2流的摇摆吸附过程.
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