二氧化碳和的吸附在多孔的超交联芳香聚合物上:纹理特性,组成和静电相互作用的影响
Noufal Merukan Chola1,2, Prayag Gajera3,2, Harshal Kulkarni3,2
1Membrane Science and Separation Technology Division, Electro Membrane Processes Laboratory, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India.
ACS omega
|July 24, 2023
概括
新的多孔聚合物显示出对二氧化碳捕获的高容量. 由于超微孔和表面,POP-1表现出优异的CO2/N2选择性,这对于碳捕获技术至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 吸附科学 吸附科学
背景情况:
- 多孔超交联芳香聚合物是具有重大工业潜力的先进多孔有机聚合物.
- 开发用于二氧化碳 (CO2) 捕获和分离的高效材料对于环境可持续性至关重要.
研究的目的:
- 合成和描述用于CO2和 (N2) 吸附的新型多孔聚合物材料.
- 研究纹理特性和表面化学对气体吸附能力和选择性的影响.
- 评估这些材料在二氧化碳捕获应用中的潜力.
主要方法:
- 合成四种多孔聚合物材料,使用印,烯,碳醇和甲烯前体.
- 使用扫描电子显微镜,传输电子显微镜,77K的吸附,里埃变换红外光谱学和X射线衍射进行了表征.
- 使用体积气体吸附系统测量CO2和N2吸附能力,并通过理想吸收溶液理论计算选择性.
主要成果:
- 多孔有机聚合物POP-4显示出最高的CO2和N2吸附能力.
- 多孔有机聚合物POP-1在298K和1bar时达到78.0的最大CO2/N2选择性.
- 超微孔和表面物种显著增强二氧化碳吸附和选择性.
结论:
- 超微孔通常无法通过标准方法检测,对于高二氧化碳吸附和选择性至关重要.
- 表面通过酸相互作用和N2排斥增强了CO2的选择性.
- 这些定制的多孔聚合物显示出对高效的二氧化碳捕获和分离技术的希望.
相关概念视频
01:20Anionic Chain-Growth Polymerization: Overview
2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
01:17Ion Exchange
623
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
623
01:14Polymer Classification: Architecture
2.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.8K
01:20Porosity and Absorption of Aggregate
327
Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...
327