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Physical adsorption of CO2 in biomass at atmospheric pressure and ambient temperature

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Abstract

In the context of climate change, advanced methods for carbon dioxide (CO2) capture are needed. Organic biomass from living organisms, e.g., plants, is known to capture CO2 by photosynthetic assimilation, yet physical adsorption of CO2 onto biomass is poorly known. Here, we used molecular modeling of various biomass components to estimate the efficiency of CO2 capture by biomass. Results show that that CO2 adsorption is controlled by a ‘CO2–water–biomass’ network involving the sharing of common water molecules. Water interacts with CO2 through CO–OH bonds. A single water molecule participates in water–biomass interaction through either H–OH or HO–H bonds. CO2 adsorption is controlled by biomass moisture. Data show that 5–56 g of CO2 could be adsorbed per gram of biomass at 230–310 K and atmospheric pressure.

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The article has associated supplementary files which both are available at the publisher website and can be requested from the authors at: https://sites.google.com/site/miladasgarpour/Posts/Completed/CO2Biomass.

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Correspondence to Saeed Shirazian.

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Asgarpour Khansary, M., Aroon, M.A. & Shirazian, S. Physical adsorption of CO2 in biomass at atmospheric pressure and ambient temperature. Environ Chem Lett 18, 1423–1431 (2020). https://doi.org/10.1007/s10311-020-01011-y

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  • DOI: https://doi.org/10.1007/s10311-020-01011-y

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