多孔CO2吸附剂的氨基化学2 吸附剂
Thien S Nguyen1, Nesibe A Dogan2, Haeseong Lim3
1Oxide & Organic Nanomaterials for Energy & Environment (ONE) Laboratory, Chemistry Program, Advanced Membranes & Porous Materials (AMPM) Center, KAUST Catalysis Center (KCC), Physical Science & Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia.
Accounts of chemical research
|September 20, 2023
概括
开发具有可调节氨基含量的新型多孔材料对于有效的碳捕获至关重要. 这项研究探讨了用于优化二氧化碳吸附和再生的初级,二级和三级氨基基基吸附剂.
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:
- 碳捕获技术对于减少排放至关重要,目前的方法依赖于具有强大的二氧化碳附着性的吸附剂.
- 氨基溶液具有很高的选择性,但会带来再生挑战,而物理吸收材料的再生能量较低,但容量和选择性降低.
- 为了实际捕获二氧化碳,需要一个统一的系统,将化学吸收和物理吸收的好处结合起来.
研究的目的:
- 研究氨基基吸附剂的可行性,以有效捕获碳.
- 设计和合成可调节氨基含量的多孔有机聚合物用于二氧化碳吸附.
- 探索二氧化碳捕获中的初级,二级和三级氨基的结构-属性关系.
主要方法:
- 合成含有初级,二级和三级胺的多孔有机聚合物.
- 直接合成二次和三级氨基;对初级氨基进行后合成修饰.
- 二氧化碳吸附/脱附特性和结合机制的表征.
主要成果:
- 三级氨基吸附剂显示物理吸附,通过抑制结合,可调整为化学吸附.
- 二次氨基吸附剂表现出比三次氨基更强的结合力.
- 主要氨基吸附剂表明化学吸附,并有可能通过氨基浸增强结合.
结论:
- 具有可调节氨基含量的多孔材料为二氧化碳捕获提供了一个有前途的方法.
- 混合氨基系统可能会导致新的结合机制和高度选择性的吸附剂.
- 开发的材料和见解有助于推进实际的二氧化碳捕获技术.
相关概念视频
Physical Properties Affecting Solubility
22.7K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
22.7K
Carbonation Shrinkage
165
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
165


