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Showing 1 to 11 of 11 for “"membrane separations"”.
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Electrochemically-mediated membrane separations for carbon dioxide capture
… several new designs for carbon dioxide (CO₂) separations using quinones in electrochemical cells. The intended application is carbon capture and sequestration. A quinone-ferrocene electrolyte is proposed as a novel chemistry for electrochemical carbon capture. Quantitative analyses are …
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Computational Modeling of Osmotically Assisted Membrane Separations with Multicomponent Solution-diffusion Theory
Osmotically assisted membrane processes (OAMP), such as forward and counter-flow reverse osmosis, are a class of separation technologies that leverage osmotic pressure differences for water purification. Accurate modeling of the solute-coupling effects for transmembrane transport is integral to the …
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Synthesis and Characterization of Sulfonated Poly(arylene ether sulfone)s for Membrane Separations
… poly(arylene ether sulfone)s to improve membrane performance. Blends of a 20% disulfonated poly(arylene ether sulfone) (BPS20) with poly(ethylene glycol) (PEG) were investigated with the objective of promoting water flux across a reverse osmosis membrane. It was considered desirable to …
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Advancing Industrial Decarbonization: Evaluating the State of Organic Membrane Technology for Class-Based Hydrocarbon Separation
Industrial organic chemical separations are major contributors to carbon dioxide (CO$_2$) emissions in the energy industry, contributing to global temperature rise. As membrane separations have successfully reduced energy requirements in water purification and desalination, their application in …
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Galvanic Displacement Across Single-Layer Graphene
… of centimeter-scale nanoporous atomically thin membranes. Palladium nanoparticles deposited on the graphene surface are observed to largely survive graphene transfer to a support membrane substrate, as well as mounting and use in aqueous diffusion cell experiments. However, diffusion experiments …
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Mixed Gas Transport Study Through Polymeric Membranes: A Novel Technique
… ventures. Industrial applications employing membrane processes range from production of pure gases to barrier coatings for protection against environmental elements. Membrane separations are simple, energy efficient processes, which can be economically competitive with traditional separation …
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Reverse-selective gas-separation membranes prepared by atom transfer radical polymerization
… exhibit some unavoidable H<sub>2</sub> loss. Membrane separations, especially those with reverse-selective membranes that selectively permeate CO<sub>2</sub> from H<sub>2</sub> streams, are a promising alternative to pressure swing adsorption. The purified H<sub>2</sub> on the …
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Novel Separation Methods using Electrodialysis/Electrodeionization for Product Recovery and Power Generation
<p>The use of electrodialytic separations for the purification of products has been a vital technique for the past 50 years in the chemical industry. Originally used for demineralization and desalination, electrodialysis and its counterparts have expanded to assist in product purification, waste …
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Surface modification of polymer membranes by self-organization
Water filtration processes employing polymer membranes have become increasingly important over the past forty years. Due to their high efficiency and modularity relative to conventional processes, membrane separations are among a suite of emerging water treatment technologies which will make …
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Control of size and charge selectivity in amphiphilic graft copolymer nanofiltration membranes
The throughput and efficiency of membrane separations make polymer filtration membranes an important resource for the pharmaceutical, food and wastewater treatment industries. Nanofiltration (NF) membranes fill an important niche between nonporous reverse osmosis membranes, which have comprehensive …
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Functionalized High Aspect Ratio Cellulose Nanocrystal Filled Composites for Gas and Liquid Separations
… is a ubiquitous feature of industry, and these separations are necessary for every facet of life down to the simple functions of breathing clean air and drinking potable water. These chemical separations account for a large portion of the total energy use both in the United States and globally. …