Pyrazolate框架与结状链条用于分离/乙烯混合物
Ying-Guang Li1, Jun-Xian Chen1, Jing-Hong Li1
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, GBRCE for Functional Molecular Engineering, School of Chemistry, IGCME, Sun Yat-Sen University, Guangzhou, 510275, China.
Small (Weinheim an der Bergstrasse, Germany)
|May 15, 2025
概括
一个新的金属酸盐框架,MAF-68,有效地分离烯和乙烯,这两种化学物质对于甲醇-olefins过程至关重要. 这种材料对烯具有很高的吸收和选择性,可以生产高纯度的气体.
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:
- 乙烯和是重要的工业化学品,市场需求很高.
- 甲醇到烯酸 (MTO) 工艺提供了一种非石油途径来生产这些烯酸.
- 烯和乙烯的有效分离是MTO技术的一个关键瓶.
研究的目的:
- 合成和描述一种用于烯/乙烯分离的新型金属酸框架 (MAF-68).
- 为了评估MAF-68对C3H6/C2H4混合物的气体吸附和选择性特性.
- 为了证明该材料生产高纯度烯和乙烯的能力.
主要方法:
- 合成了一种新的金属酸盐框架,MAF-68 ([Zn7(μ-H2O) ((tppa) 4 ((HCOO) 2)).
- 气体吸附实验以测量烯和乙烯的吸收.
- 使用混合气体吸附的选择性测量.
- 突破性的实验来评估分离性能.
主要成果:
- MAF-68在10kPa时具有4.19 mmol g-1的高烯吸收率.
- 该材料对烯比乙烯 (C3H6/C2H4) 具有高选择性,为9.5.
- 突破性实验产生了超高纯度烯 (99.9999%) 和乙烯 (99.9999%).
结论:
- MAF-68是一种高效的材料,用于分离和乙烯混合物.
- MAF-68的独特结构,包括酸链和μ-H2O桥梁,有助于其卓越的分离性能.
- 这种材料在MTO过程中具有重要的工业应用潜力.
相关概念视频
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
3.2K
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...
3.2K
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
7.6K
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.
7.6K
01:17Radical Chain-Growth Polymerization: Chain Branching
1.9K
The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
1.9K
02:18Conformations of Ethane and Propane
13.6K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
13.6K
01:26Polymer Classification: Stereospecificity
2.3K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.3K