Video Experimental Relacionado

Updated: Sep 17, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Un marco orgánico microporoso enlazado con hidrógeno con sitios de alquiniles para la separación altamente eficiente

Yu-Bo Wang¹, Yu-Xin Lin¹, Jia-Xin Wang¹

¹State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.

Journal of the American Chemical Society

|July 3, 2025

Resumen

Los investigadores desarrollaron nuevos marcos orgánicos porosos enlazados con hidrógeno (HOF) para una separación eficiente de propano / propeno. ZJU-HOF-62 demuestra una unión y selectividad superiores al propano, lo que permite la producción eficiente de propeno de alta pureza.

Área de la Ciencia:

Ciencias de los materiales
Ingeniería Química
Química supramolecular

Sus antecedentes:

La separación entre propano y propeno (C3H8/C3H6) es crucial para la producción de propeno de alta pureza.
Los métodos existentes carecen de eficiencia energética, y los marcos orgánicos porosos enlazados con hidrógeno (HOF) están poco explorados debido a la insuficiencia de sitios de unión C3H8.
La química reticular ofrece una estrategia para ajustar el tamaño y la funcionalidad de los poros, pero es un desafío en los HOF debido a los débiles enlaces H.

Objetivo del estudio:

Implementar la química reticular para el diseño y la síntesis de nuevos HOF para la separación eficiente de C3H8/C3H6.
Diseñar sistemáticamente el tamaño de los poros y los sitios funcionales en los HOF para mejorar la preferencia de unión del C3H8.
Lograr la producción de propeno de alta pureza mediante una separación energéticamente eficiente.

Principales métodos:

Síntesis de una serie de HOF isoreticulares (ZJU-HOF-59ZJU-HOF-62) utilizando cuatro ligandos tetracarboxílicos.
Ingeniería sistemática de los tamaños de los poros y los sitios funcionales dentro de las estructuras HOF.
Mediciones de adsorción y selectividad a 298 K y 1 bar, cálculos teóricos y experimentos de avance dinámico.

Principales resultados:

Se sintetizaron con éxito cuatro HOF isoreticulares con preferencias de enlace sintonizables para C3H8 sobre C3H6.
ZJU-HOF-62 exhibió la mayor absorción de C3H8 (146,8 cm3 g-1) y una selectividad de C3H8/C3H6 (1,53), lo que demuestra una separación inversa.
Los cálculos teóricos confirmaron interacciones más fuertes entre C3H8 y los sitios dialquinilo/carboxílicos del HOF.
Los experimentos dinámicos revelaron una productividad máxima de C3H6 de 12,1 L kg-1 para ZJU-HOF-62 con mezclas de gases reales.

Conclusiones:

El estudio demuestra con éxito la aplicación de la química reticular en el diseño de HOF para desafiar la separación C3H8/C3H6.
ZJU-HOF-62 es un adsorbente altamente eficiente para la absorción selectiva de propano y la purificación de propeno.
Este trabajo abre nuevas vías para el desarrollo de materiales porosos avanzados para la separación de gases industriales.

Más Videos Relacionados

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

Published on: July 14, 2015

Videos de Conceptos Relacionados

π Molecular Orbitals of 1,3-Butadiene

π Molecular Orbitals of 1,3-Butadiene

Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...

Conformations of Ethane and Propane

Conformations of Ethane and Propane

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...

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

Structure and Bonding of Alkenes

Structure and Bonding of Alkenes

Olefins, which are unsaturated hydrocarbons containing one or more carbon–carbon double bonds, are broadly divided into alkenes and cycloalkenes. The general chemical formula of an alkene is CnH2n.
Doubly bonded carbons are sp2 hybridized and have a trigonal planar geometry. The double bond is composed of a σ bond formed by the overlap of hybrid orbitals and a π bond produced by the lateral overlap of unhybridized 2p orbitals on both the carbons. Each carbon atom is...

Conformations of Cycloalkanes

Conformations of Cycloalkanes

Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...