Holey graphene frameworks for highly selective post-combustion carbon capture

Scientific Reports
Shamik Chowdhury, Rajasekhar Balasubramanian

Abstract

Atmospheric CO2 concentrations continue to rise rapidly in response to increased combustion of fossil fuels, contributing to global climate change. In order to mitigate the effects of global warming, development of new materials for cost-effective and energy-efficient CO2 capture is critically important. Graphene-based porous materials are an emerging class of solid adsorbents for selectively removing CO2 from flue gases. Herein, we report a simple and scalable approach to produce three-dimensional holey graphene frameworks with tunable porosity and pore geometry, and demonstrate their application as high-performance CO2 adsorbents. These holey graphene macrostructures exhibit a significantly improved specific surface area and pore volume compared to their pristine counterparts, and can be effectively used in post-combustion CO2 adsorption systems because of their intrinsic hydrophobicity together with good gravimetric storage capacities, rapid removal capabilities, superior cycling stabilities, and moderate initial isosteric heats. In addition, an exceptionally high CO2 over N2 selectivity can be achieved under conditions relevant to capture from the dry exhaust gas stream of a coal burning power plant, suggesting the possibil...Continue Reading

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Citations

Apr 23, 2020·Polymers·Nikolaos PolitakosRadmila Tomovska
Sep 15, 2020·Physical Chemistry Chemical Physics : PCCP·Giulia Magi Meconi, Ronen Zangi
May 24, 2018·ACS Applied Materials & Interfaces·Mateusz JanetaSławomir Szafert

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Methods Mentioned

BETA
chemical vapor deposition
X-ray
scanning
transmission electron microscopy
equilibrium adsorption

Software Mentioned

CCUS

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