11/20/2023 0 Comments Hybrid carbon capture technology![]() ![]() ![]() ![]() "This two-dimensional nature of the membrane drastically increases the CO 2 permeance, making membranes even more attractive for carbon capture. "Functionalizing CO 2-selective polymeric chains on nanoporous graphene allows us to fabricate nanometer-thick yet CO 2-selective membranes," says Agrawal. The GPUs shot up to 11,790 when the scientists combined optimized graphene porosity, pore size, and functional groups (the chemical groups that actually react with CO 2), while other membranes they made showed separation factors up to 57.2. The membranes that the EPFL scientists developed show six-fold higher CO 2 permeance at 6,180 GPUs with a separation factor of 22.5. The membranes are based on single-layer graphene with a selective layer thinner than 20 nm, and have highly tunable chemistry, meaning that they can pave the way for next-generation high-performance membranes for several critical separations.Ĭurrent membranes are required to exceed 1000 gas permeation units (GPUs), and have a CO 2/N2 separation factor above 20-this is a measure of their carbon-capturing specificity. Scientists led by Kumar Varoon Agrawal at EPFL Valais Wallis have now developed a new class of high-performance membranes that exceeds post-combustion capture targets by a significant margin. They are now considered as one of the most energy-efficient routes for reducing CO 2 emissions. These membranes are environmentally friendly, they don't generate waste, they can intensify chemical processes, and can be used in a decentralized fashion. Carbon capture can be done using high-performance membranes, which are polymer filters that can specifically pick out CO 2 from a mix of gases, such as those emitted from a factory's flue. ![]()
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