Carbon-based materials as the support for K2CO3

“Coconut shell-based activated carbon, coal-based activated carbon, wooden activated carbon, and carbon nanofibers (CNF) have been employed to preload K2CO3 for CO2 capture (Lee et al., 2006aMeis et al., 2013Querejeta et al., 2019Zhao et al., 2009b). The carbon-supported K2CO3 adsorbents retained excellent textural properties with high surface areas of 61-768 m2/g and great pore volume of 0.25-0.34 cm3/g, and these had bestowed the potassium-based adsorbents with stabilized CO2 adsorption capacities of 0.63-1.95 mmol CO2/g over repeated cycles in simulated flue gas stream. Particularly, K2CO3/CNF with a low K2CO3 loading (16 wt.%) exhibited a high CO2 uptake 1.2 mmol CO2/g, and this was associated with the accessible structure and chemical inertness of the CNF support and the binding characteristics between CNF and K2CO3 (Meis et al., 2013).”

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