Related Experiment Video
Updated: Jan 26, 2026
07:45
Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
10.4K
A Robust Zeolitic Imidazolate Framework Membrane with High H2/CO2 Separation Performance under Hydrothermal
Zhan Li1, PingPing Yang1, Shichen Yan1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , Jilin University , Changchun 130012 , P. R. China.
ACS Applied Materials & Interfaces
|April 10, 2019
Summary
Researchers developed a novel mixed-ligand ZIF membrane (JUC-160) for gas separation. This membrane shows high selectivity and stability, even in the presence of steam, making it promising for industrial applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Nanotechnology
Background:
- Membrane-based gas separation is crucial for industrial processes.
- Developing membranes with high selectivity, permeability, and stability is a key challenge.
- Metal-organic frameworks (MOFs), specifically zeolitic imidazolate frameworks (ZIFs), show potential for gas separation.
Purpose of the Study:
- To design and synthesize a novel molecular sieving ZIF membrane with enhanced gas separation properties.
- To investigate the structure-property relationships of the new membrane for CO2 separation.
- To evaluate the membrane's performance under challenging conditions, including high temperature and steam presence.
Main Methods:
- Fabrication of a mixed-ligand ZIF membrane (JUC-160) with a zeolite GIS topology.
- Characterization of the membrane's structure, including aperture size and ligand composition.
- Gas permeation and selectivity measurements (e.g., H2/CO2) at elevated temperatures.
- Assessment of thermal, chemical, and hydrothermal stability.
Main Results:
- The JUC-160 membrane possesses a unique mixed-ligand ZIF structure with appropriate pore size and strong CO2 affinity.
- The membrane exhibits excellent H2/CO2 selectivity (26.3) and high H2 permeance (9.75 × 10^-7 mol m^-2 s^-1 Pa^-1) at 200 °C.
- The membrane demonstrates exceptional thermal and chemical stability, along with superhydrophobic properties.
- Remarkable separation performance was maintained in the presence of steam due to its superhydrophobicity.
Conclusions:
- The JUC-160 membrane, with its tailored mixed-ligand ZIF structure, offers superior gas separation performance.
- Its high selectivity, permeability, and stability, including hydrothermal stability, make it a promising candidate for industrial gas separation.
- The superhydrophobic nature is key to maintaining performance in humid conditions, addressing a critical limitation in current membrane technologies.
Related Concept Videos
01:28Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists
970
Histamine H2 receptors, which are intricately located on the basolateral membrane of parietal cells, play a crucial role in modulating gastric acid secretion. When released from enterochromaffin-like cells, histamine engages H2 receptors, initiating the cyclic AMP (cAMP) pathway. In this pathway, adenylyl cyclase converts ATP into cAMP, elevating intracellular cAMP levels. The activation of protein kinase A follows, stimulating the proton pump. This stimulation prompts the secretion of hydrogen...
970
02:17Separation of Sister Chromatids
4.4K
At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...
At the onset of anaphase, separase, a proteolytic enzyme, is...
4.4K
01:15Optimizing Chromatographic Separations
941
Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
941
02:06Conditions on Early Earth
101.0K
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
101.0K
01:18Classical Conditioning
2.1K
Associative learning, a core principle in behavioral psychology, involves forming connections between events and facilitating learned responses. This concept is vividly illustrated by classical conditioning, a process extensively studied by the Russian physiologist Ivan Pavlov. Pavlov's pioneering research on dogs' digestive systems led to the discovery that behaviors can be learned through association, laying the groundwork for classical conditioning.
Ivan Pavlov observed that dogs...
Ivan Pavlov observed that dogs...
2.1K
01:28Conditions of Equilibrium
2.1K
Equilibrium refers to a state where a rigid body is not subjected to any translational or rotational motion. This state is achieved when the force and couple acting on a rigid body equal zero. When the system of external forces results in a net effect equivalent to zero, the rigid body is considered to be in equilibrium.
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
2.1K