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Mechanically robust mesoporous membranes for enhanced ultrafiltration performance
Background
Membrane separation technology is an essential field within chemical engineering and environmental science, offering a more sustainable alternative to traditional separation methods that often require energy-intensive phase changes. The demand for advanced membrane technologies, such as isoporous membranes, is driven by their potential...
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Supramolecular membrane channels for highly selective lanthanide separations
Supramolecular membrane channels built from pillar[5]arene scaffolds with specialized ligands selectively transport middle lanthanide ions like europium and terbium, enabling efficient, eco-friendly separation and recycling of rare-earth metals.
Background
Lanthanide elements are vital components in modern clean energy and electronics, finding applications...
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Graphene-enhanced membranes for improved proton exchange membrane fuel cells
Background
Proton Exchange Membrane Fuel Cells (PEMFCs) are integral to advancing clean energy, offering high efficiency and low emissions for automotive power and stationary energy generation. However, widespread adoption of PEMFCs is hindered by several performance and durability challenges. Among these, hydrogen crossover—where hydrogen molecules...
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Hydrogen-stable membranes for olefin-paraffin separation
Background
Light olefins are produced in greater quantity than any other organic chemical, with over 200 million metric tons of ethylene and propylene generated in 2016—roughly 30 kilograms for every person worldwide. Currently, olefin-paraffin separation, essential to the process, is performed by cryogenic distillation at elevated pressures....
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Low-cost high-temperature humidification membrane
Background Membrane humidifiers are widely used for gas humidification, where a dry gas channel and a water or humid gas channel are separated by a water-permeable membrane. During the operation, water vapor permeates through the membrane from the water or humid gas channel to the dry gas channel, driven by the relative humidity gradient across the...
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Polymer blends for gas separation membranes
Background Polybenzimidazoles (PBIs) have been studied for use as gas separation membranes for aggressive, high-temperature applications such as hydrogen separations due to their high chemical and thermal stability. Increasing the permeability of PBIs while maintaining good selectivity for gas pairs such as H2/CO2 would make such technology competitive...
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