قالب وردپرس درنا توس
Home / Science / Graphene may be the key to next genes that filter c02

Graphene may be the key to next genes that filter c02



A way to cut CO 2 2 from emissions (" postcombustion "). The captured CO 2 Graphene helps co2 filtering membranes get more efficient image.

 Graphene helps co2 filtering membranes get more efficient image more efficient image "/> <span class= Carbon-selective polymer chains anchored on graphene effectively pull CO2 from a flue gas mixture.Credit: KV Agrawal (EPFL)

Carbon capture can be done using high-performance membranes, which are polymeric filters 2 2 from a mix of gases, these as are emitted from a factory's flue. These membranes are environmentally friendly, they can not generate waste, they can intensify chemical processes, and can 2 Emission, Now, scientists (led by Kumar Varoon Agrawal) at Ecole Polytechnique Federale de Lausanne (EPFL ) have deve loped a new class of high-performance membranes that exceed post-combustion capture targets by a significant margin. 20 nm, and have highly tunable chemistry, so they can pave the way for next-generation high-performance membranes for several critical separations.

Current membranes are required to exceed 1

000 / N 2 separation factor above 20 – a measure of their carbon-capturing specificity. The membranes that EPFL scientists developed show six-fold higher CO 2 permeance at 6,180 GPUs with a separation factor of 22.5. 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 )).

"Functionalizing CO 2 -selective polymeric chains on nanoporous graphene allows us to fabricate nanometer-thick yet CO 2 -selective membranes," says Agrawal. "This two-dimensional nature of the membrane drastically increases the CO 2 permeance, making membranes even more attractive for carbon capture." The concept is highly generic, and a number of high-performance gas separations are possible in this way. "


Source link