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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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Non-dispersive, non-solvent algal oil recovery process
BackgroundThe development and application of a novel non-polar oil recovery process utilizing a non-dispersive solvent extraction method to coalesce and recover oil from a bio-cellular aqueous slurry is a needed process. The process could apply to recovery of algal oil from a lysed algae slurry, recovery of omega fatty acids from a bio-cellular aqueous...
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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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