在有孔的协调聚合物中的结合点的系统调节,用于从三元C2碳化合物中净化乙烯
Yi Li1, Yanxin Wu1, Jiaxin Zhao1
1State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 China duanjingui@njtech.edu.cn wqjin@njtech.edu.cn.
Chemical science
|June 21, 2024
概括
研究人员开发了一种新的多孔材料,NTU-73-CH3,用于有效地从混合C2碳化合物中净化多等级乙烯 (C2H4). 这一突破为工业乙烯生产提供了节能解决方案.
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.
- 分离科学 分离科学
背景情况:
- 全球对多等级乙烯 (C2H4) 的需求正在上升,但由于具有相似的分子性质,从三元C2碳化合物净化是能源密集的.
- 现有的方法在有效地将C2H4从乙 (C2H2) 和乙 (C2H6) 中分离时面临挑战.
研究的目的:
- 通过选择性吸附开发一种节能方法,通过选择性吸附生产多等级乙烯 (C2H4).
- 系统调整多孔协调聚合物 (PCP) 以提高C2H4净化.
主要方法:
- 在NTU-73多孔协调聚合物框架内对有机位点 (-COOH, -CF3, -CH3) 进行系统的修改.
- 在环境条件下评估NTU-73变种,用于从三元C2碳化合物混合物中净化C2H4.
- 在现场结晶学和拉曼分析以了解结构性能关系.
主要成果:
- 在NTU-73-CH3的实验中,NTU-73-CH3表现出了非常出色的直接生产多级C2H4.4的能力.
- 前体NTU-73-COOH和NTU-73-CF3的C2H4净化能力有限或不存在.
- 在NTU-73-CH3中对孔环境的调整消除了通道阻塞,并增强了与C2H2和C2H6.2的相互作用.
结论:
- 在PCP中对孔环境的系统调整是选择性气体净化的一种可行的策略.
- NTU-73-CH3为生产高纯度C2H4.3提供了一种高效且潜在的节能途径.
- 这项工作为设计用于特定分离任务的先进多孔材料提供了蓝图.
相关概念视频
Free-Radical Chain Reaction and Polymerization of Alkenes
7.8K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.8K
Olefin Metathesis Polymerization: Overview
2.1K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.1K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K
Ligand Binding and Linkage
4.8K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
4.8K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
2.6K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.6K
Ziegler–Natta Chain-Growth Polymerization: Overview
3.3K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.3K


